D defs.my
Entry 1 sense Webster, 1913

Propyl

· Pro·pyl · IPA /ˈpɹoʊpəl/
01 n. The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds.
  1. 1.
    The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds.(Chem.)