D defs.my
Entry 1 sense Webster, 1913

Protocatechuic

· Pro·to·cat·e·chu·ic · IPA
01 a. Pertaining to, derived from, or designating, an organic acid which is obtained as a white crystalline substance from catechin, asafetida, o…
  1. 1.
    Pertaining to, derived from, 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.(Chem.)