acyl
noun
ac·yl ˈa-səl 
often attributive
: a radical RCO− derived usually from an organic acid by removal of the hydroxyl from all acid groups —often used in combination
Example Sentences
Recent Examples on the Web Each of the products are also made with acyl-glutathione, which is the brand's proprietary blend of glutathione. 
Sarah Kinonen, Allure, 9 Aug. 2018
Sarah Kinonen, Allure, 9 Aug. 2018 Word History
Etymology
borrowed from German Acyl "acetyl," from New Latin acidum acid entry 1 + German -yl -yl
First Known Use
1903, in the meaning defined above
Medical Definition
acyl
noun
ac·yl ˈas-əl -ēl; ˈā-səl
-ēl; ˈā-səl : a radical derived usually from an organic acid by removal of the hydroxyl from all acid groups