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

Vessel :: Vessel (n.) A continuous tube formed from superposed large cylindrical or prismatic cells (tracheae), which have lost their intervening partitions, and are usually marked with dots, pits, rings, or spirals by internal deposition of secondary membranes; a duct..

Macrodiagonal :: Macrodiagonal (n.) The longer of two diagonals, as of a rhombic prism. See Crystallization..

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..

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

Atacamite :: Atacamite (n.) An oxychloride of copper, usually in emerald-green prismatic crystals..

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

Spoffish :: Spodumene (n.) 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..

Crayon :: Crayon (n.) An implement for drawing, made of clay and plumbago, or of some preparation of chalk, usually sold in small prisms or cylinders..

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

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..

Teinoscope :: Teinoscope (n.) An instrument formed by combining prisms so as to correct the chromatic aberration of the light while linear dimensions of objects seen through the prisms are increased or diminished; -- called also prism telescope.

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..

Stibonium :: Stibnite (n.) 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..

Dome :: Dome (n.) A prism formed by planes parallel to a lateral axis which meet above in a horizontal edge, like the roof of a house; also, one of the planes of such a form..

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..

Prismatic :: Prismatic (a.) Alt. of Prismatica.

Parallelopiped :: Parallelopiped (n.) A solid, the faces of which are six parallelograms, the opposite pairs being parallel, and equal to each other; a prism whose base is a parallelogram..

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..

Iridescence :: Iridescence (n.) Exhibition of colors like those of the rainbow; the quality or state of being iridescent; a prismatic play of color; as, the iridescence of mother-of-pearl..

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