D defs.my
Entry 1 sense Webster, 1913

Propenyl

· Pro·pe·nyl · IPA
01 n. A hypothetical hydrocarbon radical, C3H5, isomeric with allyl and glyceryl, and regarded as the essential residue of glycerin. Cf. Allyl, …
  1. 1.
    A hypothetical hydrocarbon radical, C3H5, isomeric with allyl and glyceryl, and regarded as the essential residue of glycerin. Cf. Allyl, and Glyceryl.(Chem.) See: Allyl, Glyceryl