n. The biologically important diphenol ortho-dihydroxy benzene; isomeric with hydroquinone and resorcinol.
the GNU version of the Collaborative International Dictionary of English
n. any of a group of chemicals having a benzene ring substituted with two hydroxyl groups in ortho position, especially ortho-dihydroxybenzene itself (C6H6O2), also called pyrocatechol, used in photography and as a reagent.
The Century Dictionary and Cyclopedia
n. Same as pyrocatechol or *pyrocatechin.
Word Usage
"An additional level of confidence is that a component of the reaction mixture, called catechol, actually kills the bacteria a few hours after it is added."