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n. Chemistry
An organic group having the general formula RCO-, derived from an organic acid.

[ac(id) + -yl.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Chemistry) (modifier) of, denoting, or containing the monovalent group of atoms RCO-, where R is an organic group: acyl group or radical; acyl substitution.
2. (Elements & Compounds) an organometallic compound in which a metal atom is directly bound to an acyl group
[C20: from acid + -yl]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈæs ɪl, -il)

the univalent group RCO–, where R is any organic group attached to one bond of the carbonyl group.
[1895–1900; < German]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.acyl - any group or radical of the form RCO- where R is an organic group; "an example of the acyl group is the acetyl group"
acetyl, acetyl group, acetyl radical, ethanoyl group, ethanoyl radical - the organic group of acetic acid (CH3CO-)
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
foryml - (chemistry) the negative univalent acyl radical CHO that occurs in aldehydes
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Each of these studies examined the dynamics of the phospholipids defined by the head group and/or the fatty acid composition of the acyl side chains.
The mouse peroxisome proliferator activated receptor recognizes a response element in the 5' flanking sequence of the rat acyl CoA oxidase gene.
Vinyl esters especially vinyl acetate and butyrate have been described the most valuable and widely used acyl donors [28, 29] due to irreversible nature of the reaction and the absence of low volatile side products [30, 31].
Abbreviations: ACP, acyl carrier protein; DAG, diacylglycerol; DH, doubled haploid; DM, dry matter; KASII, [beta]-ketoacyl-ACP synthase II; PC, phosphatidyl choline; PA, phosphatidic acid; [r.sub.s], Spearman rank; TAG, triacylglycerol.
The peroxisome proliferator (PP) response element upstream of the human acyl CoA oxidase gene is inactive among a sample human population: significance for species differences in response to PPs.
Keywords: Coniferyl alcohol; acyl and benzyl derivatives; antitubercular activity; Mycobacterium tuberculosis H37Rv.
Summary: Acylated low molecular weight chitosans (LChA) were prepared from nucleophilic acylation of chitosan using acid anhydrides of short and medium chain length (4 - 10) to study the response of applied heat as a function of acyl chain length.
The pradigastat, which is an inhibitor of acyl coA: diacylglycerol acyl transferase (DGAT1), is a well-characterized molecule that has progressed to Phase 3 clinical testing.
ACP enzymes are cofactors responsible for acyl chain modification and chain-length termination during lipid biosynthesis in living organisms, being the isoform I the one that is reported mainly in seeds (LI et al., 2010).
[USPRwire, Thu Oct 18 2018] Polyimide polymers are derived from monomers of imide group, a functional group comprising two acyl groups.
In addition, lipid species with longer fatty acyl chains were more abundant in HCV-infected cells, and free poly-unsaturated fatty acid (PUFA) levels were greatly increased.