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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.

element (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.

ral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties…

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

A white or flesh-red mineral, of the zeolite, occurring in isometric crystals. By friction, it acquires a weak electricity; hence its name.

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

ered analogous to natural death. J. H. Newman. nalogous pole (Pyroelect.), that pole of a crystal which becomes positively electrified when heated.

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

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

A native sulphate of lead. It occurs in white or yellowish transparent, prismatic crystals.

Not isometric; having unsymmetrical parts; -- said of crystals with three unequal axes. Dana.

Not isotropic; having different properties in different directions; thus, crystals of the isometric system are optically isotropic, but all other crystals are anisotropic.

Having unequal oblique axes; as, anorthic crystals.