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Flint Glass :: Flint glass () A soft, heavy, brilliant glass, consisting essentially of a silicate of lead and potassium. It is used for tableware, and for optical instruments, as prisms, its density giving a high degree of dispersive power; -- so called, because formerly the silica was obtained from pulverized flints. Called also crystal glass. Cf. Glass..

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

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

Warwickite :: Warwickite (n.) A dark brown or black mineral, occurring in prismatic crystals imbedded in limestone near Warwick, New York. It consists of the borate and titanate of magnesia and iron..

Topaz :: Topaz (n.) A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem..

Prismoid :: Prismoid (n.) A body that approaches to the form of a prism.

Yenite :: Yenite (n.) A silicate of iron and lime occurring in black prismatic crystals; -- also called ilvaite.

Staurolitic :: Staurolite (n.) 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..

Prism :: Prism (n.) A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms..

Iris :: Iris (n.) An appearance resembling the rainbow; a prismatic play of colors.

Brachydiagonal :: Brachydiagonal (a.) Pertaining to the shorter diagonal, as of a rhombic prism..

Prismatically :: Prismatically (adv.) In the form or manner of a prism; by means of a prism.

Prismoidal :: Prismoidal (a.) Having the form of a prismoid; as, prismoidal solids..

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

Gieseckite :: Gieseckite (n.) A mineral occurring in greenish gray six-sided prisms, having a greasy luster. It is probably a pseudomorph after elaeolite..

Metallochrome :: Metallochrome (n.) 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..

Diamond :: Diamond (n.) A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness..

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..

Camera Lucida :: Camera lucida () An instrument which by means of a prism of a peculiar form, or an arrangement of mirrors, causes an apparent image of an external object or objects to appear as if projected upon a plane surface, as of paper or canvas, so that the outlines may conveniently traced. It is generally used with the microscope..

Indigo :: Indigo (n.) A kind of deep blue, one of the seven prismatic colors..

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