glyceryl Syllabification: (glyc·er·yl)Pronunciation: /ˈglisəˌril/Definition of glyceryl noun [as modifier] Chemistry of or denoting a radical derived from glycerol by replacement of one or more hydrogen atoms:glyceryl trinitrateOrigin: mid 19th century: from glycerin + -ylglyceryl in other Oxford dictionaries Definition of glyceryl in the British & World English dictionary