n. [ Gr. li`pos fat + -yl. ] (Chem.) A hypothetical radical of glycerin. [ Obs. ] Berzelius. [ 1913 Webster ]
n. [ L. vinum wine + -yl. ] (Chem.) The hypothetical radical C2H3, regarded as the characteristic residue of ethylene and that related series of unsaturated hydrocarbons with which the allyl compounds are homologous. [ 1913 Webster ]