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A volatile liquid consisting of three parts of carbon, six of hydrogen, and one of oxygen; pyroacetic spirit, -- obtained by the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime.

A complex, hypothetical radical, composed of two parts of carbon to three of hydrogen and one of oxygen. Its hydroxide is acetic acid.

A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant. W…

tinued pain, as distinguished from sudden twinges, or spasmodic pain. "Such an ache in my bones." Shak.

d of the united tendons of the large muscles in the calf of the leg, an inserted into the bone of the heel; -- so called from the mythological account of Achilles being held by the heel when dipped in the River Styx.

ourish; as, an acidulous tincture. E. Burke. Acidulous mineral waters, such as contain carbonic anhydride.

A genus of ganoid fishes, including the sturgeons, having the body armed with bony scales, and the mouth on the under side of the head. See Sturgeon.

rns, etc. See Cryptogamia. The Age of Acrogens (Geol.), the age of coal plants, or the carboniferous era.

(Anat.) One of the bones at the base of a paired fin of a fish.

qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

Of or pertaining to animal fat; fatty. Adipose fin (Zoöl.), a soft boneless fin. -- Adipose tissue (Anat.), that form of animal tissue which forms or contains fat.

Near to the maxilla or jawbone.

To combine or charge with gas; usually with carbonic acid gas, formerly called fixed air. His sparkling sallies bubbled up as from aërated natural fountains. Carlyle.

The act or preparation of charging with carbonic acid gas or with oxygen.

Light as air; ethereal. Aërial acid, carbonic acid. [Obs.] Ure. -- Aërial perspective. See Perspective.

irrespirable gas, remaining after an explosion of fire damp in mines; choke damp. See Carbonic acid.

A hard, compact variety of carbonate of lime, somewhat translucent, or of banded shades of color; stalagmite. The name is used in this sense by Pliny. It is sometimes distinguished as oriental alabaster.

Pertaining to expansions of the ethmoid bone or

Pertaining to expansions of the nasal bone or cartilage.

ounds thus include not only the fatty acids and other derivatives of the paraffin hydrocarbons, but also unsaturated compounds, as the ethylene and acetylene series.