Cardiidae cardigan • cardin · · · Info · Definitions · Characters · · Cardiidae · · Text Latin · · Script 9 · · Length Definitions · · · (noun) somewhat heart-shaped sand-burrowing bivalve mollusks. Synonyms: family Cardiidae. · · Noun Definition 1 Characters · · C latin capital letter c U+0043 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 r latin small letter r U+0072