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Webster 1913 Edition

Noun.

[

Hex-

-yl

(chem.)

A univalent organic radical,

C6H13-

, regarded as the essential residue of hexane, and a related series of compounds.

hexyl ‎(plural hexyls)

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

From hex- +‎ -yl.

hexyl n ‎(uncountable)