trilliaceae trilli • trilliaceous · · · Info · Definitions · Characters · · trilliaceae · · Text Latin · · Script 11 · · Length 4 · · Syllables Definitions · · · (noun) small family of herbs having flowers with 3 petals and 3 sepals; in some classification systems considered a subfamily of the Liliaceae. Synonyms: Trilliaceae, family Trilliaceae, trillium family. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 t latin small letter t U+0074