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A coloring produced by the deposition of some metallic compound; specifically, the prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity.

or weight in pounds of a column of the same body) which would be necessary to elongate a prismatic body of a transverse section equal to a given unit, as a square inch or foot, to double, or to compress it to half, its original length, were that degree of elongation or compression possible, or within the limits of ela…

s, which contain five molecules of water of crystallization; distinguished from common or prismatic borax. -- Octahedral iron ore (Min.), magnetite.

n this experiment the several intervals of the teeth of the comb do the office of so many prisms. Sir I. Newton.

A bay window. See Bay window. The beams that thro' the oriel shine Make prisms in every carven glass. Tennyson.

A variety of allanite occurring in slender prismatic crystals.

ich are six parallelograms, the opposite pairs being parallel, and equal to each other; a prism whose base is a parallelogram.

of a word in such a way as to be capable of double meaning; punning. -- Play of colors, prismatic variation of colors. -- To bring into play, To come into play, to bring or come into use or exercise. -- To hold in play, to keep occupied or employed. I, with two more to help me, Will hold the foe in play. Macaulay.…

A smooth, glossy surface, usually produced by friction; a gloss or luster. Another prism of clearer glass and better polish. Sir I. Newton.

emble forms of a system other than that to which they belong, as the apparently hexagonal prisms of aragonite.

A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90º, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. Th…

- Reciprocal figures (Geom.), two figures of the same kind (as triangles, parallelograms, prisms, etc.), so related that two sides of the one form the extremes of a proportion of which the means are the two corresponding sides of the other; in general, two figures so related that the first corresponds in some special w…

Serving or tending to refract; as, a refracting medium. Refracting angle of a prism (Opt.), the angle of a triangular prism included between the two sides through which the refracted beam passes in the decomposition of light. -- Refracting telescope. (Opt.) See under Telescope.

Pertaining to, or possessing, refringency; refractive; refracting; as, a refringent prism of spar. Nichol.

he Right on political questions. See Center, n., 5. -- Right cone, Right cylinder, Right prism, Right pyramid (Geom.), a cone, cylinder, prism, or pyramid, the axis of which is perpendicular to the base. -- Right line. See under Line. -- Right sailing (Naut.), sailing on one of the four cardinal points, so as to alt…

veral colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Illust. of Light, and Spectroscope.

A mineral of a white to yellowish, purplish, or emerald-green color, occuring in prismatic crystals, often of great size. It is a silicate of aluminia and lithia. See Hiddenite.

A mineral of a brown to black color occurring in prismatic crystals, often twinned so as to form groups resembling a cross. It is a silicate of aluminia and iron, and is generally found imbedded in mica schist. Called also granatite, and grenatite.

A mineral of a lead-gray color and brilliant metallic luster, occurring in prismatic crystals; sulphide of antimony; -- called also antimony glance, and gray antimony.

reenish, or yellowish color, usually occurring in fibrous massive forms, but sometimes in prismatic crystals.