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Measure :: Measure (n.) A standard of dimension; a fixed unit of quantity or extent; an extent or quantity in the fractions or multiples of which anything is estimated and stated; hence, a rule by which anything is adjusted or judged..

Refraction :: Refraction (n.) The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction..

Infraction :: Infraction (n.) The act of infracting or breaking; breach; violation; nonobservance; infringement; as, an infraction of a treaty, compact, rule, or law..

Fraction :: Fraction (n.) A portion; a fragment.

Neurine :: Neurine (n.) A poisonous organic base (a ptomaine) formed in the decomposition of protagon with boiling baryta water, and in the putrefraction of proteid matter. It was for a long time considered identical with choline, a crystalline body originally obtained from bile. Chemically, however, choline is oxyethyl-trimethyl-ammonium hydroxide, while neurine is vinyl-trimethyl-ammonium hydroxide..

Reduce :: Reduce (n.) To change the form of a quantity or expression without altering its value; as, to reduce fractions to their lowest terms, to a common denominator, etc..

Integer :: Integer (n.) A complete entity; a whole number, in contradistinction to a fraction or a mixed number..

Refraction :: Refraction (n.) The correction which is to be deducted from the apparent altitude of a heavenly body on account of atmospheric refraction, in order to obtain the true altitude..

Iceland Spar :: Iceland spar () A transparent variety of calcite, the best of which is obtained in Iceland. It is used for the prisms of the polariscope, because of its strong double refraction. Cf. Calcite..

Fractional :: Fractional (a.) Of or pertaining to fractions or a fraction; constituting a fraction; as, fractional numbers..

Lap :: Lap (n.) One circuit around a race track, esp. when the distance is a small fraction of a mile; as, to run twenty laps; to win by three laps. See Lap, to fold, 2..

Diffractive :: Diffractive (a.) That produces diffraction.

Part :: Part (n.) One of the portions, equal or unequal, into which anything is divided, or regarded as divided; something less than a whole; a number, quantity, mass, or the like, regarded as going to make up, with others, a larger number, quantity, mass, etc., whether actually separate or not; a piece; a fragment; a fraction; a division; a member; a constituent..

Decimal :: Decimal (n.) A number expressed in the scale of tens; specifically, and almost exclusively, used as synonymous with a decimal fraction..

Algorithm :: Algorithm (n.) The art of calculating with any species of notation; as, the algorithms of fractions, proportions, surds, etc..

Sexagesimal :: Sexagesimal (n.) A sexagesimal fraction.

Breach :: Breach (n.) Specifically: A breaking or infraction of a law, or of any obligation or tie; violation; non-fulfillment; as, a breach of contract; a breach of promise..

Dioptrical :: Dioptrical (a.) Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope..

Prism :: Prism (n.) A transparent body, with usually three rectangular plane faces or sides, and two equal and parallel triangular ends or bases; -- used in experiments on refraction, dispersion, etc..

Argument :: Argument (n.) The quantity on which another quantity in a table depends; as, the altitude is the argument of the refraction..

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