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A white, pearly mineral, occurring thin and foliated, like talc, and also fibrous; a native magnesium hydrate.

alatal bones of fishes belonging to the family of Pycnodonts (thick teeth), whose remains occur in the oölite and chalk formations; toadstone; -- so named from a notion that it was originally formed in the head of a toad.

nlargement and inflammation of a small membranous sac (one of the bursæ muscosæ), usually occurring on the first joint of the great toe.

A hydrous phosphate of iron occurring in yellow radiated tufts. The phosphorus seriously injures it as an iron ore.

A comparatively rare element related to zinc, and occurring in some zinc ores. It is a white metal, both ductile and malleable. Symbol Cd. Atomic weight 111.8. It was discovered by Stromeyer in 1817, who named it from its association with zinc or zinc ore. Cadmium yellow, a compound of cadmium and sulphur, of an intens…

A metrical break in a verse, occurring in the middle of a foot and commonly near the middle of the verse; a sense pause in the middle of a foot. Also, a long syllable on which the cæsural accent rests, or which is used as a foot.

An alkaloid resembing physostigmine and occurring with it in the calabar bean.

A name formerly given to various fevers occuring in tropics; esp. to a form of furious delirium accompanied by fever, among sailors, which sometimes led the affected person to imagine the sea to be a green field, and to throw himself into it.

A mineral occurring in hexagonal crystals, also massive, generally of a yellow color, containing silica, alumina, lime, soda, and carbon dioxide.

acid, C9H9.CO2H, Caprylic acid, C7H15.CO2H, and Caproic acid, C5H11.CO2H, are fatty acids occurring in small quantities in butter, cocoanut oil, etc., united with glycerin; they are colorless oils, or white crystalline solids, of an unpleasant odor like that of goats or sweat.

lled. Carbamic acid (Chem.), an amido acid, NH2.CO2H, not existing in the free state, but occurring as a salt of ammonium in commercial ammonium carbonate; -- called also amido formic acid.

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 hexagonal prisms or tables. When united with oxygen it forms carbon dioxide, commonly…

A black variety of diamond, found in Brazil, and used for diamond drills. It occurs in irregular or rounded fragments, rarely distinctly crystallized, with a texture varying from compact to porous.

The radical (CO)'\'b7, occuring, always combined, in many compounds, as the aldehydes, the ketones, urea, carbonyl chloride, etc.

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…

An event; an occurrence; an occasion; a combination of circumstances; a case; an act of God. See the Note under Accident. Casus belli, an event or combination of events which is a cause war, or may be alleged as a justification of war. -- Casus fortuitus, an accident against which due prudence could not have provided.…

A process by which reaction occurs in the presence of certain agents which were formerly believed to exert an influence by mere contact. It is now believed that such reactions are attended with the formation of an intermediate compound or compounds, so that by alternate composition and decomposition the agent is appare…

Consisting of, or occuring in, disconnected parts or snatches; changeable; as, a catchy wind.

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

Occurring once in every hundred years; centennial. "Centenary solemnities." Fuller.