benzene

(ben'zen). Benzenum, benzol, chemical formula, C,Hj, a hydrocarbon from light coal-tar oil; a thin, colorle , inflammable liquid; has been employed by inhalation in pertu is, and internally for trichiniasis in doses of nj^s-io (o. 3-0.6), but is now seldom so used. b. bro'mide, a gas einployed in warfare as a lacrymator or tear gas.* b. nu'cleus, the six carbon atoms of the b. ring. b. ring, the closed-chain arrange in ent of the carbon and hydrogen atoms in the benzene molecule, as shown in the graphic formula of that substance; see closed-