from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The univalent radical or group OH, a characteristic component of bases, certain acids, phenols, alcohols, carboxylic and sulfonic acids, and amphoteric compounds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A univalent radical or functional group (–OH) in organic chemistry; present in alcohols, phenols, carboxylic acids and certain other classes of compounds.
from the GNU version of the Collaborative International Dictionary of English
- n. A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.
from The Century Dictionary and Cyclopedia
- n. A compound radical (OH) which has never been isolated, but which is a factor in a vast number of chemical compounds.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the monovalent group -OH in such compounds as bases and some acids and alcohols
hydr(o)- + ox(ygen) + -yl.(American Heritage® Dictionary of the English Language, Fourth Edition)