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Halo :: Halo (n.) A luminous circle, usually prismatically colored, round the sun or moon, and supposed to be caused by the refraction of light through crystals of ice in the atmosphere. Connected with halos there are often white bands, crosses, or arches, resulting from the same atmospheric conditions..

Round :: Round (a.) Full; complete; not broken; not fractional; approximately in even units, tens, hundreds, thousands, etc.; -- said of numbers..

Scrip :: Scrip (n.) Paper fractional currency.

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

Integral :: Integral (a.) Of, pertaining to, or being, a whole number or undivided quantity; not fractional..

Diffraction :: Diffraction (n.) The deflection and decomposition of light in passing by the edges of opaque bodies or through narrow slits, causing the appearance of parallel bands or fringes of prismatic colors, as by the action of a grating of fine lines or bars..

Anaclastic :: Anaclastic (a.) Produced by the refraction of light, as seen through water; as, anaclastic curves..

Benzene :: Benzene (n.) A volatile, very inflammable liquid, C6H6, contained in the naphtha produced by the destructive distillation of coal, from which it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum..

Inflection :: Inflection (n.) Same as Diffraction.

Refraction :: Refraction (n.) The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different density from that through which it has previously moved..

Fraction :: Fraction (n.) The act of breaking, or state of being broken, especially by violence..

Stereoscopic :: Stereoscope (n.) An optical instrument for giving to pictures the appearance of solid forms, as seen in nature. It combines in one, through a bending of the rays of light, two pictures, taken for the purpose from points of view a little way apart. It is furnished with two eyeglasses, and by refraction or reflection the pictures are superimposed, so as to appear as one to the observer..

Aphakia :: Aphakia (n.) An anomalous state of refraction caused by the absence of the crystalline lens, as after operations for cataract. The remedy is the use of powerful convex lenses..

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..

Rainbow :: Rainbow (n.) A bow or arch exhibiting, in concentric bands, the several colors of the spectrum, and formed in the part of the hemisphere opposite to the sun by the refraction and reflection of the sun's rays in drops of falling rain..

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..

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..

Fraction :: Fraction (v. t.) To separate by means of, or to subject to, fractional distillation or crystallization; to fractionate; -- frequently used with out; as, to fraction out a certain grade of oil from pretroleum..

Diacaustic :: Diacaustic (n.) That which burns by refraction, as a double convex lens, or the sun's rays concentrated by such a lens, sometimes used as a cautery..

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..

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