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## zero

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{adj: leftmost} farthest to the left
"the leftmost non-zero digit"

"a negative number"

{adj: nilpotent} equal to zero when raised to a certain power

{adj: nonnegative} either positive or zero

{adj: no} quantifier; used with either mass nouns or plural count nouns for indicating a complete or almost complete lack or zero quantity of
"we have no bananas"
"no eggs left and no money to buy any"
"have you no decency?"
"did it with no help"
"I'll get you there in no time"
<-> all, some

"positive numbers"

{adj: zero, 0} indicating the absence of any or all units under consideration
"a zero score"

{adj: zero} having no measurable or otherwise determinable value
"the goal is zero population growth"

{adj: zero} indicating an initial point or origin

{adj: zero} of or relating to the null set (a set with no members)

{adv: vanishingly} so as to disappear or approach zero
"errors are vanishingly rare"

{n: Benford's law} a law used by auditors to identify fictitious populations of numbers; applies to any population of numbers derived from other numbers
"Benford's law holds that 30% of the time the first non-zero digit of a derived number will be 1 and it will be 9 only 4.6% of the time"

{n: Greenwich Meridian} the meridian passing through Greenwich; was internationally adopted as the earth's zero of longitude in 1884

{n: Greenwich} a borough of Greater London on the Thames; zero degrees of longitude runs through Greenwich; time is measured relative to Greenwich Mean Time

{n: Kelvin scale, absolute scale} a temperature scale that defines absolute zero as 0 degrees; water freezes at 273.16 degrees and boils at 373.16 degrees

{n: Kirchhoff's laws} (physics) two laws governing electric networks in which steady currents flow: the sum of all the currents at a point is zero and the sum of the voltage gains and drops around any closed circuit is zero

{n: absolute zero} (cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal); 0 Kelvin or -273.15 centigrade or -459.67 Fahrenheit

{n: additive inverse} (mathematics) one of a pair of numbers whose sum is zero; the additive inverse of -5 is +5

{n: agonic line} an imaginary line connecting points on the Earth's surface where the magnetic declination is zero

{n: aleph-null, aleph-nought, aleph-zero} the smallest infinite integer

{n: astatic coils} an arrangement of coils used in sensitive electrical instruments; the coils are arranged to give zero resultant external magnetic field when a current passes through them and to have zero electromotive force induced in them by an external magnetic field

{n: billion, one million million, 1000000000000} the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen

{n: billion, one thousand million, 1000000000} the number that is represented as a one followed by 9 zeros

{n: crore} the number that is represented as a one followed by 7 zeros; ten million

{n: deflection, deflexion} the movement of the pointer or pen of a measuring instrument from its zero position

{n: deuterium, heavy hydrogen} an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)

{n: diagonal matrix} a square matrix with all elements not on the main diagonal equal to zero

{n: diagonalization, diagonalisation} changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal)
"the diagonalization of a normal matrix by a unitary transformation"

{n: eccentricity} (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis
"a circle is an ellipse with zero eccentricity"

{n: eigenvalue, eigenvalue of a matrix, eigenvalue of a square matrix, characteristic root of a square matrix} (mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant

{n: googolplex} a cardinal number represented as 1 followed by a googol of zeros (ten raised to the power of a googol)

{n: googol} a cardinal number represented as 1 followed by 100 zeros (ten raised to the power of a hundred)

{n: ground zero} the point of detonation (or above or below) of a nuclear weapon

{n: ground zero} the site of the World Trade Center before it was destroyed

{n: ground zero} the target of a projectile (as a bomb or missile)

{n: ground, earth} a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage)

{n: infinitesimal} (mathematics) a variable that has zero as its limit

{n: integer, whole number} any of the natural numbers (positive or negative) or zero

{n: love} a score of zero in tennis or squash
"it was 40 love"

{n: million, 1000000, one thousand thousand, meg} the number that is represented as a one followed by 6 zeros

{n: negativity, negativeness} an amount less than zero
<-> positiveness, positivity

{n: neutrino} an elementary particle with zero charge and zero mass

{n: nonsingular matrix} a square matrix whose determinant is not zero
<-> singular matrix

{n: nothing, nil, nix, nada, null, aught, cipher, cypher, goose egg, naught, zero, zilch, zip, zippo} a quantity of no importance
"it looked like nothing I had ever seen before"
"reduced to nil all the work we had done"
"we racked up a pathetic goose egg"
"it was all for naught"
"I didn't hear zilch about it"

{n: number} a concept of quantity derived from zero and units
"every number has a unique position in the sequence"

{n: octillion} the number that is represented as a one followed by 27 zeros

{n: origin} the point of intersection of coordinate axes; where the values of the coordinates are all zero

{n: phase, phase angle} a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle

{n: positivity, positiveness} an amount greater than zero
<-> negativeness, negativity

{n: prime meridian} meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)

{n: quadrillion} the number that is represented as a one followed by 15 zeros

{n: quadrillion} the number that is represented as a one followed by 24 zeros
"in England they call a septillion a quadrillion"

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

{n: revolving charge account} a charge account that does not have to be paid to zero balance

{n: septillion} the number that is represented as a one followed by 24 zeros

{n: sextillion} the number that is represented as a one followed by 21 zeros

{n: significant digit, significant figure} any digit of a number that is known with certainty; any digit of a number beginning with the leftmost non-zero digit and ending with the rightmost non-zero digit (or a zero considered to be the exact value)
"he calculated the answer to four significant figures"

{n: singular matrix} a square matrix whose determinant is zero
<-> nonsingular matrix

{n: standard temperature} exactly zero degrees centigrade

{n: straight line} a line traced by a point traveling in a constant direction; a line of zero curvature
"the shortest distance between two points is a straight line"
<-> curve

{n: strange particle} an elementary particle with non-zero strangeness

{n: third law of thermodynamics} law stating that the entropy of a substance approaches zero as its temperature approaches absolute zero

{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: trillion, one million million, 1000000000000} the number that is represented as a one followed by 12 zeros
"in England they call a trillion a billion"

{n: zero coupon bond, zero-coupon bond} a bond that is issued at a deep discount from its value at maturity and pays no interest during the life of the bond; the commonest form of zero-coupon security

{n: zero hour} the time set for the start of an action or operation

{n: zero tolerance} extreme intolerance of antisocial behavior (usually by an uncompromising application of the law)
"he urged zero tolerance for priests who abuse children sexually"

{n: zero, 0, nought, cipher, cypher} a mathematical element that when added to another number yields the same number

{n: zero, zero point} the quantity that registers a reading of zero on a scale

{n: zero-coupon security, zero coupon security} a security that makes no interest payments but instead is sold at a deep discount from its face value

{n: zero-sum game} a game in which the total of all the gains and losses is zero

{n: zero-tolerance policy} any policy that allows no exception
"a zero-tolerance policy toward pedophile priests"

{v: range in, home in, zero in} direct onto a point or target, especially by automatic navigational aids

{v: read, register, show, record} indicate a certain reading ; of gauges and instruments
"The thermometer showed thirteen degrees below zero"

{v: reset} set to zero
"reset instruments and dials"

{v: zero, zero in} adjust (as by firing under test conditions) the zero of (a gun)
"He zeroed in his rifle at 200 yards"

{v: zero} adjust (an instrument or device) to zero value

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