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{adj: active} of the sun; characterized by a high level activity in sunspots and flares and radio emissions
<-> quiet

{adj: all-mains} used of a radio receiver that is adaptable to all voltages
"an all-mains set"

{adj: battery-powered} powered by one or more electric batteries
"a battery-powered radio"

{adj: blaring, blasting} unpleasantly loud and penetrating
"the blaring noise of trumpets"
"shut our ears against the blasting music from his car radio"

{adj: blatant, clamant, clamorous, strident, vociferous} conspicuously and offensively loud; given to vehement outcry
"blatant radios"
"a clamorous uproar"
"strident demands"
"a vociferous mob"

{adj: folksy} very informal and familiar
"a folksy radio commentator"
"a folksy style"

{adj: infrared} having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
"infrared radiation"
"infrared photography"

{adj: lightless} giving no light
"lightless stars `visible' only to radio antennae"

{adj: plummy} (of a voice) affectedly mellow and rich
"the radio announcer's plummy voice"

{adj: raddled, worn-out} used until no longer useful
"battered trumpets and raddled radios"
"worn-out shoes with flapping soles"

{adj: radio-controlled} operated and guided by radio
"a radio-controlled airplane"

{adj: radiopaque, radio-opaque} not transparent to X-rays or other forms of radiation
"barium sulfate is radiopaque"
<-> radiolucent

{adj: radio} indicating radiation or radioactivity

{adj: strong} having strength or power greater than average or expected
"a strong radio signal"
"strong medicine"
"a strong man"
<-> weak

{adj: transmitted} sent electronically as by wire or radio
"the transmitted signals"

{adv: faithfully, dependably, reliably} in a faithful manner
"it always came on, faithfully, like the radio"
<-> undependably, unfaithfully, unreliably

{adv: for good measure} in addition (as to close a deal)
"the car salesman threw in the radio, for good measure"

{adv: here} in or at this place; where the speaker or writer is
"I work here"
"turn here"
"radio waves received here on Earth"
<-> there

{adv: softly, quietly} with low volume
"speak softly but carry a big stick"
"she spoke quietly to the child"
"the radio was playing softly"
<-> loudly

{n: Appleton layer, F layer, F region} the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission

{n: D-layer, D region} the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

{n: De Forest, Lee De Forest, Father of Radio} United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961)

{n: Federal Communications Commission, FCC} an independent government agency that regulates interstate and international communications by radio and television and wire and cable and satellite

{n: Heaviside layer, Kennelly-Heaviside layer, E layer, E region} a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length

{n: Heaviside, Oliver Heaviside} English physicist and electrical engineer who helped develop telegraphic and telephonic communications; in 1902 (independent of A. E. Kennelly) he suggested the existence of an atmospheric layer that reflects radio waves back to earth (1850-1925)

{n: Kennelly, A. E. Kennelly, Arthur Edwin Kennelly} United States electrical engineer noted for his work on the theory of alternating currents; independently of Oliver Heaviside he discovered the existence of an atmospheric layer that reflects radio waves back to earth (1861-1939)

{n: Lovell, Sir Bernard Lovell, Sir Alfred Charles Bernard Lovell} English astronomer who pioneered radio astronomy (born in 1913)

{n: Marconi, Guglielmo Marconi} Italian electrical engineer who invented wireless telegraphy and in 1901 transmitted radio signals across the Atlantic Ocean (1874-1937)

{n: Rediffusion} a system for distributing radio or tv programs

{n: SOS} an internationally recognized distress signal in radio code

{n: Sarnoff, David Sarnoff} United States businessman who pioneered in radio and television broadcasting (1891-1971)

{n: Thomas, Lowell Thomas, Lowell Jackson Thomas} a radio broadcast journalist during World War I and World War II noted for his nightly new broadcast (1892-1981)

{n: air, airwave} medium for radio and television broadcasting
"the program was on the air from 9 til midnight"
"the president used the airwaves to take his message to the people"

{n: amplitude modulation, AM} modulation of the amplitude of the (radio) carrier wave

{n: announcer} reads news, commercials on radio or television

{n: antenna, aerial, transmitting aerial} an electrical device that sends or receives radio or television signals

{n: blackout} a suspension of radio or tv broadcasting

{n: broadcast area} the area over which a radio or tv transmission can be received

{n: broadcast journalist} a journalist who broadcasts on radio or television

{n: broadcast, program, programme} a radio or television show
"did you see his program last night?"

{n: broadcaster} someone who broadcasts on radio or television

{n: broadcasting company} a company that manages tv or radio stations

{n: broadcasting} taking part in a radio or tv program

{n: broadcast} message that is transmitted by radio or television

{n: cabinet, console} housing for electronic instruments, as radio or television

{n: call-in} a telephone call to a radio station or a television station in which the caller participates in the on-going program

{n: carrier wave, carrier} a radio wave that can be modulated in order to transmit a signal

{n: clock radio} a radio that includes a clock that can be set to turn it on automatically

{n: commercial, commercial message} a commercially sponsored ad on radio or television

{n: communications, communication theory} the discipline that studies the principles of transmiting information and the methods by which it is delivered (as print or radio or television etc.)
"communications is his major field of study"

{n: coverage, reporting, reportage} the news as presented by reporters for newspapers or radio or television
"they accused the paper of biased coverage of race relations"

{n: crystal set} an early radio receiver using a crystal detector

{n: detector, demodulator} rectifier that extracts modulation from a radio carrier wave

{n: detector} electronic equipment that detects the presence of radio signals or radioactivity

{n: dial} the control on a radio or television set that is used for tuning

{n: direction finder} radio; determines the direction of incoming radio waves

{n: dish, dish aerial, dish antenna, saucer} directional antenna consisting of a parabolic reflector for microwave or radio frequency radiation

{n: drone, pilotless aircraft, radio-controlled aircraft} an aircraft without a pilot that is operated by remote control

{n: dry cell} a small Leclanche cell containing no free liquid; the electrolyte is a paste and the negative zinc pole forms the container of the cell; used in flashlights, portable radios, etc.

{n: electrical system} equipment in a motor vehicle that provides electricity to start the engine and ignite the fuel and operate the lights and windshield wiper and heater and air conditioner and radio

{n: entertainment industry, show business, show biz} those involved in providing entertainment: radio and television and films and theater

{n: ethernet} a type of networking technology for local area networks; coaxial cable carries radio frequency signals between computers at a rate of 10 megabits per second

{n: facsimile, facsimile machine, fax} duplicator that transmits the copy by wire or radio

{n: frequency band, waveband} a band of adjacent radio frequencies (e.g., assigned for transmitting radio or television signals)

{n: frequency modulation, FM} modulation of the frequency of the (radio) carrier wave

{n: game show, giveaway} a television or radio program in which contestants compete for awards

{n: goniometer} direction finder that determines the angular direction of incoming radio signals

{n: ground control} a communication system for sending continuous radio messages to an airplane pilot who is making a ground-controlled approach to landing

{n: ground wave} a radio wave propagated on or near the earth's surface

{n: guided missile} a rocket-propelled missile whose path can be controlled during flight either by radio signals or by internal homing devices

{n: ham} a licensed amateur radio operator

{n: heterodyne receiver, superheterodyne receiver, superhet} a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified

{n: huckster} a person who writes radio or tv advertisements

{n: infrared, infrared light, infrared radiation, infrared emission} electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

{n: laugh track} prerecorded laughter added to the soundtrack of a radio or television show

{n: light time} distance measured in terms of the speed of light (or radio waves)
"the light time from Jupiter to the sun is approximately 43 minutes"

{n: local oscillator, heterodyne oscillator} an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones

{n: log} a written record of messages sent or received
"they kept a log of all transmission by the radio station"
"an email log"

{n: long wave} a radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz)

{n: medium wave} a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)

{n: microwave} a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data

{n: narrative, narration, story, tale} a message that tells the particulars of an act or occurrence or course of events; presented in writing or drama or cinema or as a radio or television program
"his narrative was interesting"
"Disney's stories entertain adults as well as children"

{n: newsroom} an office in which news is processed by a newspaper or news agency or television or radio station

{n: omnirange, omnidirectional range, omnidirectional radio range} a navigational system consisting of a network of radio beacons that provide aircraft with information about exact position and bearing

{n: one-way light time, OWLT} the elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object

{n: playlist, play list} a list of musical selections for performance or for broadcast by radio

{n: potentiometer, pot} a resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets

{n: production} a presentation for the stage or screen or radio or television
"have you seen the new production of Hamlet?"

{n: push-button radio} a radio receiver that can be tuned by pressing buttons

{n: quasar, quasi-stellar radio source} a starlike object that may send out radio waves and other forms of energy; many have large red shifts

{n: question master, quizmaster} the host or chairman of a radio or tv quiz show or panel game

{n: radar, microwave radar, radio detection and ranging, radiolocation} measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects

{n: radio announcer} an announcer whose voice is broadcast on radio

{n: radio antenna, radio aerial} omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received

{n: radio astronomy} the branch of astronomy that detects and studies the radio waves emitted by celestial bodies

{n: radio beacon, beacon} a radio station that broadcasts a directional signal for navigational purposes

{n: radio beacon} a characteristic signal emitted by a transmitter used for navigation

{n: radio beam, beam} a signal transmitted along a narrow path; guides pilots in darkness or bad weather

{n: radio brightness} the strength of a radio wave picked up by a radio telescope

{n: radio broadcast} a broadcast via radio

{n: radio chassis} a chassis for a radio receiver

{n: radio compass} a direction finder that gives a bearing by determining the direction of incoming radio signals

{n: radio frequency} an electromagnetic wave frequency between audio and infrared

{n: radio interferometer} radio telescope that uses interference patterns from two antennas instead of a parabolic antenna

{n: radio link, link} a two-way radio communication system (usually microwave); part of a more extensive telecommunication network

{n: radio news} a radio broadcast of news

{n: radio noise} static at radio wavelengths

{n: radio observation} an observation made with a radio telescope

{n: radio operator} someone who operates a radio transmitter

{n: radio receiver, receiving set, radio set, radio, tuner, wireless} an electronic receiver that detects and demodulates and amplifies transmitted signals

{n: radio signal} a radio wave used to transmit and receive messages

{n: radio source} an object that radiates radio waves

{n: radio spectrum, radio-frequency spectrum} the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television

{n: radio station} station for the production and transmission of radio broadcasts

{n: radio telescope, radio reflector} astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources

{n: radio transmitter} transmitter that is the part of a radio system that transmits signals

{n: radio wave, radio emission, radio radiation} an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m

{n: radio, radiocommunication, wireless} medium for communication

{n: radio, wireless} a communication system based on broadcasting electromagnetic waves

{n: radio-phonograph, radio-gramophone} electronic equipment consisting of a combination of a radio receiver and a record player

{n: radiopacity, radio-opacity} opacity to X-rays or other radiation

{n: radiophotograph, radiophoto} a photograph transmitted by radio waves

{n: radiophotography} transmission of photographs by radio waves

{n: radiotelegraph, radiotelegraphy, wireless telegraph, wireless telegraphy} the use of radio to send telegraphic messages (usually by Morse code)

{n: radiotelegraph, radiotelegraphy, wireless telegraphy} telegraphy that uses transmission by radio rather than by wire

{n: radiotelephone, radiophone, wireless telephone} a telephone that communicates by radio waves rather than along cables

{n: radiotelephone, radiotelephony, wireless telephone} telephony that uses transmission by radio rather than by wire

{n: radome, radar dome} a housing for a radar antenna; transparent to radio waves

{n: receiver, receiving system} set that receives radio or tv signals

{n: result, resultant, final result, outcome, termination} something that results
"he listened for the results on the radio"

{n: scanner, electronic scanner} a radio receiver that moves automatically across some selected range of frequencies looking for some signal or condition
"they used scanners to monitor police radio channels"

{n: seeker} a missile equipped with a device that is attracted toward some kind of emission (heat or light or sound or radio waves)

{n: set} any electronic equipment that receives or transmits radio or tv signals
"the early sets ran on storage batteries"

{n: short wave} a radio wave with a wavelength less than 100 meters (a frequency greater than 3 megahertz)

{n: signature, signature tune, theme song} a melody used to identify a performer or a dance band or radio/tv program

{n: simulcast} a broadcast that is carried simultaneously by radio and television (or by FM and AM radio)

{n: skip distance} the shortest distance that permits radio signals (of a given frequency) to travel from the transmitter to the receiver by reflection from the ionosphere

{n: sky wave} a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface

{n: smart bomb} a bomb that can be guided (by a laser beam or radio) to its target
"smart bombs have revolutionized aerial bombardment"
<-> dumb bomb

{n: soap opera} a serialized program usually dealing with sentimentalized family matters that is broadcast on radio or television (frequently sponsored by a company advertising soap products)

{n: solar flare, flare} a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference

{n: sound bite} a very short speech; usually on radio or television

{n: soundman} a technician in charge of amplifying sound or producing sound effects (as for a TV or radio broadcast)

{n: spark transmitter} an early radio transmitter using a discharge across a spark gap as the source of its power

{n: spot} a short section or illustration (as between radio or tv programs or in a magazine) that is often used for advertising

{n: studio} workplace consisting of a room or building where movies or television shows or radio programs are produced and recorded
<-> location

{n: telemetry} automatic transmission and measurement of data from remote sources by wire or radio or other means

{n: time signal} a signal (especially electronic or by radio) indicating the precisely correct time

{n: transcript} something that has been transcribed; a written record (usually typewritten) of dictated or recorded speech
"he read a transcript of the interrogation"
"you can obtain a transcript of this radio program by sending a self-addressed envelope to the station"

{n: transmitter, sender} set used to broadcast radio or tv signals

{n: tune} the adjustment of a radio receiver or other circuit to a required frequency

{n: walkie-talkie, walky-talky} small portable radio link (receiver and transmitter)

{n: wave angle} the angle of arrival (or departure) of a radio wave with respect to the axis of an antenna array

{n: wireless local area network, WLAN, wireless fidelity, WiFi} a local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet; uses ethernet protocol

{n: wireless} transmission by radio waves

{v: air, send, broadcast, beam, transmit} broadcast over the airwaves, as in radio or television
"We cannot air this X-rated song"

{v: break in, break} enter someone's property in an unauthorized manner, usually with the intent to steal or commit a violent act
"Someone broke in while I was on vacation"
"They broke into my car and stole my radio!"

{v: break, bust} ruin completely
"He busted my radio!"
<-> repair

{v: call in} make a phone call
"call in to a radio station"
"call in sick"

{v: call} send a message or attempt to reach someone by radio, phone, etc. ; make a signal to in order to transmit a message
"Hawaii is calling!"
"A transmitter in Samoa was heard calling"

{v: dance, trip the light fantastic, trip the light fantastic toe} move in a pattern ; usually to musical accompaniment ; do or perform a dance
"My husband and I like to dance at home to the radio"

{v: function, work, operate, go, run} perform as expected when applied
"The washing machine won't go unless it's plugged in"
"Does this old car still run well?"
"This old radio doesn't work anymore"
<-> malfunction

{v: get on, be on} appear in a show, on T.V., radio, etc.
"The news won't be on tonight"

{v: heterodyne} combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two

{v: interview, question} conduct an interview in television, newspaper, and radio reporting

{v: pledge, subscribe} pay (an amount of money) as a contribution to a charity or service, especially at regular intervals
"I pledged $10 a month to my favorite radio station"

{v: radio} transmit messages via radio waves
"he radioed for help"

{v: raise} establish radio communications with
"They managed to raise Hanoi last night"

{v: receive} convert into sounds or pictures
"receive the incoming radio signals"

{v: redouble} double in magnitude, extent, or intensity
"The enemy redoubled their screaming on the radio"

{v: sign off} cease broadcasting ; get off the air ; as of radio stations

{v: tune in} regulate (a radio or television set) in order to receive a certain station or program

{v: turn down, lower, lour} make lower or quieter
"turn down the volume of a radio"

{v: write in} write to an organization
"Many listeners wrote in after the controversial radio program"

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