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A crystalline substance, C9H13O3N, obtained from suprarenal extract, of which it is regarded as the active principle. It is used in medicine as a stimulant and hemostatic.

A semipellucid, uncrystallized variety of quartz, presenting various tints in the same specimen. Its colors are delicately arranged in stripes or bands, or blended in clouds.

A white crystalline base, C3H7NO2, derived from aldehyde ammonia.

A white crystalline resinous substance extracted from gutta- percha by the action of alcohol or ether.

A mineral of the feldspar family, triclinic in crystallization, and in composition a silicate of alumina and soda. It is a common constituent of granite and of various igneous rocks. See Feldspar.

A crystallizable compound of a salt with alcohol, in which the latter plays a part analogous to that of water of crystallization. Graham.

A crystalline, transparent, colorless substance found in the allantoic liquid of the fetal calf; -- formerly called allantoic acid and amniotic acid.

Variability in chemical constitution without variation in crystalline form.

Any one of two or more distinct crystalline forms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite.

A crystalline derivative of salicylic acid, used as an antiseptic and antirheumatic.

ement (esp. an alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization.

A characteristic crystalline substance, obtained from oil of bitter almonds.

A variety of crystallized quartz, of a purple or bluish violet color, of different shades. It is much used as a jeweler's stone. Oriental amethyst, the violet-blue variety of transparent crystallized corundum or sapphire.

A state of being amorphous; esp. a state of being without crystallization even in the minutest particles, as in glass, opal, etc.

Without crystallization in the ultimate texture of a solid substance; uncrystallized.

also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syenite, diorite, most varieties of trachyte, etc. See Hornblende.

A glucoside extracted from bitter almonds as a white, crystalline substance.

A crystalline compound used as an antipyretic and analgesic, employed chiefly in rheumatism and neuralgia. It is a complex derivative of quinoline.

An acrid, poisonous, crystallizable substance, obtained from, the anemone, or from anemonin.

An acrid, poisonous, crystallizable substance, obtained from some species of anemone.