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The incision of a capsule, esp. of that of the crystalline lens, as in a cataract operation.

A white crystallized substance, C12H8NH, derived from aniline and other amines.

ms the base of lampblack and charcoal, and enters largely into mineral coals. In its pure crystallized state it constitutes the diamond, the hardest of known substances, occuring in monometric crystals like the octahedron, etc. Another modification is graphite, or blacklead, and in this it is soft, and occurs in hexago…

d used for diamond drills. It occurs in irregular or rounded fragments, rarely distinctly crystallized, with a texture varying from compact to porous.

A beautiful crystalline compound, SiC, consisting of carbon and silicon in combination; carbon silicide. It is made by heating carbon and sand together in an electric furnace. The commercial article is dark-colored and iridescent. It is harder than emery, and is used as an abrasive.

A white crystalline substance, C9H6N.OH, of acid properties derived from one of the amido cinnamic acids.

ome element or radical; as, potassium carboxide. Potassium carboxide, a grayish explosive crystalline compound, C6O6K, obtained by passing carbon monoxide over heated potassium.

A white crystalline nitrogenous substance, found in extract of meat, and related to xanthin.

A red crystallizable tasteless substance, extracted from the carrot.

A tasteless and odorless crystalline substance, extracted from cloves, polymeric with common camphor.

A white, crystallizable, bitter substance extracted from oil of cascarilla.

Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; also massive, sometimes in compact forms with concentric fibrous structure resembling wood (wood tin), also in rolled fragments or pebbly (Stream tin). It is the chief source of metallic ti…

A white crystalline substance obtained from castoreum.

An opacity of the crystalline lens, or of its capsule, which prevents the passage of the rays of light and impairs or destroys the sight.

One of the tannic acids, extracted from catechu as a white, crystaline substance; -- called also catechuic acid, and catechuin.

strontium sulphate, a mineral so named from its occasional delicate blue color. It occurs crystallized, also in compact massive and fibrous forms.

A waxy substance obtained from the bark of the sugar cane, and crystallizing in delicate white laminæ.

A white crystalline substance, C27H55.OH, obtained from Chinese wax, and regarded as an alcohol of the marsh gas series; -- called also cerotic alcohol, ceryl alcohol.

Native lead carbonate; a mineral occurring in colorless, white, or yellowish transparent crystals, with an adamantine, also massive and compact.

ia Islandica). It consists of several ingredients, among which is cetraric acid, a white, crystalline, bitter substance.