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the solid state by cold; frozen water. It is a white or transparent colorless substance, crystalline, brittle, and viscoidal. Its specific gravity (0.92, that of water at 4° C. being 1.0) being less than that of water, ice floats.

A plant (Mesembryanthemum crystallinum), sprinkled with pellucid, watery vesicles, which glisten like ice. It is native along the Mediterranean, in the Canaries, and in South Africa. Its juice is said to be demulcent and diuretic; its ashes are used in Spain in making glass. Ice-skater = one who skates on ice wearing a…

Apperaing in distinct crystals; -- said of the mineral constituents of a rock.

Exhibiting interference figures without the aid of a polariscope, as certain crystals.

An alkaloid found in nux vomica, and extracted as a white crystalline substance.

A silicate of iron and lime occurring in black prismatic crystals and columnar masses.

A dark yellow, crystalline substance, obtained by the action of ammonia on isatin.

plant with a conspicuous, dry, unwithering involucre, as the species of Antennaria, Helichrysum, Gomphrena, etc. See Everlasting.

(or Icica) mostly tropical American. The gum resin is used for incense. In Jamaica the Chrysobalanus Icaco, a tree related to the plums, is called incense tree. -- Incense wood, the fragrant wood of the tropical American tree Bursera heptaphylla.

r, burning with a brilliant white light. -- Indian grass (Bot.), a coarse, high grass (Chrysopogon nutans), common in the southern portions of the United States; wood grass. Gray. -- Indian hemp. (Bot.) (a) A plant of the genus Apocynum (A. cannabinum), having a milky juice, and a tough, fibrous bark, whence the name…

s obtained as a dark blue earthy powder, with a reddish luster, C16H10N2O2, which may be crystallized by sublimation. Indigo blue is also made from artificial amido cinnamic acid, and from artificial isatine; and these methods are of great commercial importance. Called also indigotin. (b) A dark, dull blue color like t…

A dark red crystalline substance, isomeric with and resembling indigo blue, and obtained from isatide and dioxindol.

A white, crystalline substance, C8H7N, obtained from blue indigo, and almost all indigo derivatives, by a process of reduction. It is also formed from albuminous matter, together with skatol, by putrefaction, and by fusion with caustic potash, and is present in human excrement, as well as in the intestinal canal of som…

A white crystalline substance with a sweet taste, found in certain animal tissues and fluids, particularly in the muscles of the heart and lungs, also in some plants, as in unripe pease, beans, potato sprouts, etc. Called also phaseomannite.

ects; esp., the powdered flowers of certain species of Pyrethrum, a genus now merged in Chrysanthemum. Called also Persian powder.

invention. Interference figures (Optics), the figures observed when certain sections of crystallized bodies are viewed in converging polarized light; thus, a section of a uniaxial crystal, cut normal to the vertical axis, shows a series of concentric colored rings with a single black cross; -- so called because produc…

la, Helianthus, Campanula, etc., and is extracted by solution as a tasteless, white, semicrystalline substance, resembling starch, with which it is isomeric. It is intermediate in nature between starch and sugar. Called also dahlin, helenin, alantin, etc.

A yellow, crystalline, volatile substance, CI3H, having an offensive odor and sweetish taste, and analogous to chloroform. It is used in medicine as a healing and antiseptic dressing for wounds and sores.

A crystallized substance of the composition C4I4NH, technically tetra-iodo-pyrrol, used like iodoform.

A white crystalline substance obtained by the partial reduction of isatin. [Written also isatyde.]