from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Chemistry A radical having the general formula RCO-, derived from an organic acid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of class of organic radicals, RCO-, formed by the removal of a hydroxyl group from a carboxylic acid.
from the GNU version of the Collaborative International Dictionary of English
- n. An acid radical, as acetyl, malonyl, or benzoyl. An acyl radical can be depicted as R-CO-, where -CO- is the carbonyl group, and R is the group that characterizes the acyl moiety.
from The Century Dictionary and Cyclopedia
- n. A name introduced by Liebermann to designate an acid radical such as acetyl, C2H3O.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any group or radical of the form RCO- where R is an organic group
ac(id) + -yl.(American Heritage® Dictionary of the English Language, Fourth Edition)