pyrocatechol[pī′rō kat′ə c̸hôl′, -c̸hōl′, -kôl′, -kōl′]
a white, crystalline phenol, CH(OH), occurring naturally in plants and now usually produced synthetically: used as an antiseptic, as a photographic developer, etc.
Origin of pyrocatecholpyro- + catech(u) + -ol
A biologically important phenol, C6H6O2, having two hydroxyl groups attached to the benzene ring, used in dyeing, tanning, photography, and as an antiseptic. Also called catechol.