What is "hexyl"

Hexyl \Hex"yl\, n. [Hex- + -yl.] (chem.) A univalent organic radical, C6H13-, regarded as the essential residue of hexane, and a related series of compounds.

n. (context organic chemistry English) Either of many isomeric univalent hydrocarbon radicals, C₆H₁₃, formally derived from hexane by the loss of a hydrogen atom