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To indicate by numerals; also, to compute. As through a crystal glass the figured hours are seen. Dryden.

A yellow crystalline substance extracted from fustet, and regarded as its essential coloring principle; -- called also fisetic acid.

vided in the direction of the grain, like wood, or along natural planes of cleavage, like crystals. This crystal is a pellucid, fissile stone. Sir I. Newton.

A compound or twin crystal consisting of five individuals.

A yellow, crystalline, organic dyestuff, C16H14N2, of artifical production. It is a strong base, and is a complex derivative of aniline and quinoline.

A yellow, crystalline, organic base, C13H12N2O, obtained artificially.

A yellow, crystalline substance, obtained from anthraquinone, and regarded as a hydroxyl derivative of it.

- so called, because formerly the silica was obtained from pulverized flints. Called also crystal glass. Cf. Glass.

g no flowers. Flowerless plants, plants which have no true flowers, and produce no seeds; cryptigamous plants.

structure characteristic of certain volcanic rocks in which the arrangement of the minute crystals shows the lines of flow of thew molten material before solidification; -- also called fluxion structure.

A white crystalline hydrocarbon C

A colorless, crystalline hydrocarbon, C13H10 having a beautiful violet fluorescence; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially.

A yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin.…

in their substance, light different in color from the mass of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it. The light emitted by fluor…

of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in cubes with perfect octahedral cleavage; also massive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.

dy, by exposing it to the X rays and observing the shadow cast upon a fluorescent screen; cryptoscopy.

Laminated, but restricted to the variety of laminated structure found in crystalline schist, as mica schist, etc.; schistose.

The property, possessed by some crystalline rocks, of dividing into plates or slabs, which is due to the cleavage structure of one of the constituents, as mica or hornblende. It may sometimes include slaty structure or cleavage, though the latter is usually independent of any mineral constituent, and transverse to the…

A simple gland or glandular cavity; a crypt.

A kind of soft sweetmeat made by boiling solutions to the point of crystallization, usually molded; as, cherry fondant.