clethraceae clethra alnifolia • Clethraceae · · · Info · Definitions · Characters · · clethraceae · · Text Latin · · Script 11 · · Length 3 · · Syllables Definitions · · · (noun) coextensive with the genus Clethra. Synonyms: Clethraceae, family Clethraceae, white-alder 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 h latin small letter h U+0068 l latin small letter l U+006C r latin small letter r U+0072 t latin small letter t U+0074