sirenian Sirenia • sirenic · · · Info · Definitions · Synonyms · Characters · · sirenian · · Text Latin · · Script 8 · · Length Definitions · · · (noun) any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs. Synonyms: sea cow, sirenian mammal. · · Noun Definition 1 Synonyms · · · sea cow · · Synonym 1 sirenian mammal · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073