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barite

(Encyclopedia)barite bərīˈtēz [key] [New Lat., from barium], or heavy spar, a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO4, found in nature as tabular crystals or in granular...

oxalic acid

(Encyclopedia)oxalic acid ĕthˌāndīōĭk [key], HO2CCO2H, a colorless, crystalline organic carboxylic acid that melts at 189℃ with sublimation. Oxalic acid and oxalate salts are poisonous. Oxalic acid is found...

acetone

(Encyclopedia)acetone prōˈpənōn [key], CH3COCH3, colorless, flammable liquid. Acetone melts at −94.8℃ and boils at 56.2℃. It is the simplest aliphatic ketone. Acetone is widely used in industry as a solve...

Carothers, Wallace Hume

(Encyclopedia)Carothers, Wallace Hume kərŭᵺˈərz [key], 1896–1937, American chemist, b. Burlington, Iowa. He received his doctorate at the Univ. of Illinois in 1924, then taught organic chemistry there and a...

coltsfoot

(Encyclopedia)coltsfoot, Eurasian perennial herb (Tussilago farfara) of the family Asteraceae (aster family), now a widespread weed in most northern lands. The scaly flower stalk bears a yellow flower head and down...

bitumen

(Encyclopedia)bitumen bĭtyo͞oˈmən [key] a generic term referring to flammable, brown or black mixtures of tarlike hydrocarbons, derived naturally or by distillation from petroleum. It can be in the form of a vi...

cough

(Encyclopedia)cough, sudden, forceful expiration of air from the lungs caused by an involuntary contraction of the muscles controlling the process of breathing. The cough is a response to some irritating condition ...

life

(Encyclopedia)life, although there is no universal agreement as to a definition of life, its biological manifestations are generally considered to be organization, metabolism, growth, irritability, adaptation, and ...

coke

(Encyclopedia)coke, substance obtained by the destructive distillation of bituminous coal. Coke bears the same relation to coal as does charcoal to wood. A hard, gray, massive, porous fuel, coke is the solid residu...

bromine

(Encyclopedia)bromine brōˈmēn, –mĭn [key] [Gr.,=stench], volatile, liquid chemical element; symbol Br; at. no. 35; at. wt. 79.904; m.p. –7.2℃; b.p. 58.78℃; sp. gr. of liquid 3.12 at 20℃; density of va...