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{adj: eighteen, 18, xviii} being one more than seventeen



{adj: liable} held legally responsible
"men between the ages of 18 and 35 were liable for military service"

{n: 18-karat gold} an alloy that contains 75 per cent gold

{n: Aquarius, Aquarius the Water Bearer, Water Bearer} the eleventh sign of the zodiac; the sun is in this sign from about January 20 to February 18

{n: Arminius, Armin, Hermann} German hero; leader at the battle of Teutoburger Wald in AD 9 (circa 18 BC - AD 19)

{n: Campfire Girl} a girl who is a member of Campfire Girls; for girls age 7-18

{n: Citlaltepetl, Mount Orizaba, Mt Orizaba, Pico de Orizaba} an extinct volcano in southern Mexico between Mexico City and Veracruz; the highest peak in Mexico (18,695 feet)

{n: Purana} a body of 18 works written between the first and 11th centuries and incorporating legends and speculative histories of the universe and myths and customary observances

{n: Waterloo, Battle of Waterloo} the battle on 18 June 1815 in which Prussian and British forces under Blucher and the Duke of Wellington routed the French forces under Napoleon

{n: alpha-linolenic acid} a polyunsaturated fatty acid with 18 carbon atoms; the only omega-3 fatty acid found in vegetable products; it is most abundant in canola oil; a fatty acid essential for nutrition

{n: argon, Ar, atomic number 18} a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

{n: attosecond} one quintillionth (10^-18) of a second; one thousandth of a femtosecond

{n: double} a quantity that is twice as great as another
"36 is the double of 18"

{n: eighteen, 18, XVIII} the cardinal number that is the sum of seventeen and one

{n: eighteenth} position 18 in a countable series of things

{n: giant scrambling fern, Diplopterygium longissimum} large scrambling fern forming large patches to 18 feet high; Pacific region and China

{n: girl, miss, missy, young lady, young woman, fille} a young woman
"a young lady of 18"

{n: golf, golf game} a game played on a large open course with 9 or 18 holes; the object is use as few strokes as possible in playing all the holes

{n: half-and-half} half milk and half light cream; contains 10% to 18% butterfat

{n: hole, golf hole} one playing period (from tee to green) on a golf course
"he played 18 holes"

{n: jacksmelt, Atherinopsis californiensis} a relatively large silversides of the Pacific coast of North America (known to reach 18 inches in length)

{n: karat, carat, kt} the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold

{n: kilderkin} an obsolete British unit of capacity equal to 18 Imperial gallons

{n: light cream, coffee cream, single cream} cream that has at least 18% butterfat
"in England they call light cream `single cream'"

{n: light minute} the distance light travels in a vacuum in one minute; approximately 18 million kilometers

{n: lowest common multiple, least common multiple, lcm} the smallest multiple that is exactly divisible by every member of a set of numbers
"the least common multiple of 12 and 18 is 36"

{n: mackerel} flesh of very important usually small (to 18 in) fatty Atlantic fish

{n: moderate breeze} wind moving 13-18 knots; 4 on the Beaufort scale

{n: nautical mile, naut mi, mile, mi, geographical mile, Admiralty mile} a British unit of length equivalent to 1,853.18 meters (6,082 feet)

{n: primary amenorrhea} delay of menarche beyond age 18

{n: quintillion} the number that is represented as a one followed by 18 zeros

{n: rhythm method of birth control, rhythm method, rhythm, calendar method of birth control, calendar method} natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle)

{n: round of golf, round} the activity of playing 18 holes of golf
"a round of golf takes about 4 hours"

{n: trillion, one million million million} the number that is represented as a one followed by 18 zeros
"in England they call a quintillion a trillion"

{n: workhouse} a county jail that holds prisoners for periods up to 18 months

{v: go} be contained in
"How many times does 18 go into 54?"

{v: sign} be engaged by a written agreement
"He signed to play the casino on Dec. 18"
"The soprano signed to sing the new opera"


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