[uh-seet-l, uh-set-l, as-i-tl]

adjective Chemistry.

containing the acetyl group.

Origin of acetyl

First recorded in 1860–65; acet- + -yl Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for acetyl



(modifier) of, consisting of, or containing the monovalent group CH 3 CO-acetyl group or radical
Derived Formsacetylic (ˌæsɪˈtɪlɪk), adjective

Word Origin for acetyl

C19: from acet (ic) + -yl
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

acetyl in Medicine


[ə-sētl, ăsĭ-tl]


The acetic acid radical CH3CO.
Related formsac′e•tylic (ăs′ĭ-tĭlĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

acetyl in Science


[ə-sētl, ăsĭ-tl]

The radical CH3CO, derived from acetic acid.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.