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Dihexagonal :: Dihexagonal (a.) Having twelve similar faces; as, a dihexagonal prism..

Taurine :: Taurine (n.) A body occurring in small quantity in the juices of muscle, in the lungs, and elsewhere, but especially in the bile, where it is found as a component part of taurocholic acid, from which it can be prepared by decomposition of the acid. It crystallizes in colorless, regular six-sided prisms, and is especially characterized by containing both nitrogen and sulphur, being chemically amido-isethionic acid, C2H7NSO3..

Apatite :: Apatite (n.) Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent..

Andalusite :: Andalusite (n.) A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain..

Clinorhombic :: Clinorhombic (a.) Possessing the qualities of a prism, obliquely inclined to a rhombic base; monoclinic..

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..

Iriscope :: Iriscope (n.) A philosophical toy for exhibiting the prismatic tints by means of thin films.

Iridescent :: Iridescent (a.) Having colors like the rainbow; exhibiting a play of changeable colors; nacreous; prismatic; as, iridescent glass..

Prismatical :: Prismatical (a.) Separated or distributed by a prism; formed by a prism; as, prismatic colors..

Duct :: Duct (n.) A large, elongated cell, either round or prismatic, usually found associated with woody fiber..

Spectrum :: Spectrum (n.) The several 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..

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..

Beryl :: Beryl (n.) A mineral of great hardness, and, when transparent, of much beauty. It occurs in hexagonal prisms, commonly of a green or bluish green color, but also yellow, pink, and white. It is a silicate of aluminium and glucinum (beryllium). The aquamarine is a transparent, sea-green variety used as a gem. The emerald is another variety highly prized in jewelry, and distinguished by its deep color, which is probably due to the presence of a little oxide of chromium..

Cylinder :: Cylinder (n.) The revolving square prism carrying the cards in a Jacquard loom.

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..

Pseudo-symmetry :: Pseudo-symmetry (n.) A kind of symmetry characteristic of certain crystals which from twinning, or other causes, come to resemble forms of a system other than that to which they belong, as the apparently hexagonal prisms of aragonite..

Traject :: Traject (v. t.) To throw or cast through, over, or across; as, to traject the sun's light through three or more cross prisms..

Zoisite :: Zoisite (n.) A grayish or whitish mineral occurring in orthorhombic, prismatic crystals, also in columnar masses. It is a silicate of alumina and lime, and is allied to epidote..

Anglesite :: Anglesite (n.) A native sulphate of lead. It occurs in white or yellowish transparent, prismatic crystals..

Strontic :: Strontianite (n.) Strontium carbonate, a mineral of a white, greenish, or yellowish color, usually occurring in fibrous massive forms, but sometimes in prismatic crystals..

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