from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white crystalline compound, C6H4(OH)2, used as a photographic developer, an antioxidant, a stabilizer, and a reagent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The diphenol para-dihydroxy benzene, used as a mild reducing agent in photographic developing; isomeric with catechol and resorcinol.
from 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.
from 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.
hydro- + quinone (Wiktionary)