n. The diphenol para-dihydroxy benzene, used as a mild reducing agent in photographic developing; isomeric with catechol and resorcinol.
the GNU version of the Collaborative International Dictionary of English
n. A white crystalline substance, C6H4(OH)2, obtained by the reduction of quinone. It is a diacid phenol, resembling, and metameric with, pyrocatechin and resorcin. Called also dihydroxy benzene.
The Century Dictionary and Cyclopedia
n. A divalent phenol (C6H4 (OH)2) prepared by the oxidation of aniline and treatment of the quinol formed with sulphurous acid.
Word Usage
"It turns out this kind of hydroquinone discussions are actually"