'Propyl' definitions:

Definition of 'propyl'

(from WordNet)
noun
The monovalent organic group C3H7- obtained from propane [syn: propyl, propyl group, propyl radical]

Definition of 'Propyl'

From: GCIDE
  • Propyl \Pro"pyl\, n. [Propionic + -yl.] (Chem.) The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds. [1913 Webster]