allyl allying • allyl alcohol · · · Info · Definitions · Synonyms · Characters · · allyl · · Text Latin · · Script 5 · · Length 2 · · Syllables Definitions · · · (noun) the univalent unsaturated organic radical C3H5; derived from propylene. Synonyms: allyl group, allyl radical. · · Noun Definition 1 Synonyms · · · allyl group · · Synonym 1 allyl radical · · Synonym 2 Characters · · a latin small letter a U+0061 l latin small letter l U+006C y latin small letter y U+0079