retinol retinoid • retinopapilitis · · · Info · Definitions · Synonyms · Characters · · retinol · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene. Synonyms: vitamin A1. · · Noun Definition 1 Synonyms · · · vitamin a1 · · Synonym 1 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074