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

[ac(id) + -yl.]


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]


(ˈæs ɪl, -il)

the univalent group RCO–, where R is any organic group attached to one bond of the carbonyl group.
[1895–1900; < German]
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
References in periodicals archive ?
In contrast to stable ether glucuronides, such as morphine glucuronides (25), acyl glucuronides have been reported to be highly reactive because of their intrinsic susceptibility to nucleophilic attack via the ester group linking the parent drug and the glucuronic acid moiety (19).
However, sarcosinates and acyl glutamates have their cations attached to (weakly acidic) carboxylate anions; these can undergo cationic migrations similar to tallow/coco soaps.
Although the latter has not yet been demonstrated for AcMPAG, the possibility exists that this acyl glucuronide contributes to side effects observed in patients receiving MMF therapy through the mechanisms mentioned above.
M-2 has been observed regularly in the plasma of liver, kidney, and heart transplant recipients undergoing treatment with MMF (8) and has been identified as the acyl glucuronide of MPA (10).
Prolonged fasting (>24 h), on the other hand, will cause an increase of acyl carnitine (10, 17, 22).
Acyl urged for a review of the role African central banks in the development of the continent in order to ensure the existence of interest rates that served the needs of key sectors.
Each chapter addresses one of seven major lipid classes--fatty acids, eicosanoids and bioactive lipid mediators, fatty acyl esters and amides, glycerol esters, glycerophospholipids, sphingolipids, and steroids--with details on the pathways of formation of major product ions and ions used for structural characterization.
Fatima Haram Acyl, Commissioner for Trade and Industry, African Union Commission (AUC) discusses the work of AUC and its partners the African Development Bank, the United Nations Economic Commission for Africa and the United Nations Development.
L'Afrique unie, depassant en termes de population l'UE, menacee de perdre le rang de plus importante zone de libre-echange du monde, veut [beaucoup moins que] surprendre le monde [beaucoup plus grand que], assure la commissaire au commerce de l'Union africaine, Fatima Haram Acyl.