sirenian mammal
any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs • Syn: sea cow, sirenian • Hypernyms: aquatic mammal • Hyponyms: manatee, Trichechus manatus, dugong, Dugong dugon, Steller's sea cow, Hydrodamalis gigas • Member Holonyms: Sirenia, order Sirenia
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