• (n.) A compound radical, C6H13, regarded as the essential residue of hexane, and a related series of compounds.
Hex'yl noun [ Hex- + - yl .] (chem.) A compound radical, C 6 H 13 , regarded as the essential residue of hexane , and a related series of compounds. 
Type: Term Pronunciation: hek′sil Definitions: 1. The radical of hexane, CH3(CH2)4CH2—.