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

A white crystalline substance, C6H4(OH)2, of the phenol series, found in various plants; -- so called because first obtained by distillation of gum catechu. Called also catechol, oxyphenol. etc.

Of or pertaining to catechu or its derivatives. See catechin.

A colorless liquid resembling phenol or carbolic acid, homologous with pyrocatechin, and obtained from beechwood tar and gum guaiacum. [Written also creasol.]

A colorless liquid, C7H8O2, with a peculiar odor. It is the methyl ether of pyrocatechin, and is obtained by distilling guaiacum from wood-tar creosote, and in other ways. It has been used in treating pulmonary tuberculosis.

d by the reduction of quinone. It is a diacid phenol, resembling, and metameric with, pyrocatechin and resorcin. Called also dihydroxy benzene.

to, or designating, the phenol formerly called oxyphenic acid, and now oxyphenol and pyrocatechin. See Pyrocatechin.

A phenol, oxyphenic acid, and now pyrocatechin.

, or designating, an organic acid which is obtained as a white crystalline substance from catechin, asafetida, oil of cloves, etc., and by distillation itself yields pyrocatechin.

btained by the decomposition of veratric acid, and constituting the dimethyl ether of pyrocatechin.