Also found in: Thesaurus.
Related to sirenian mammal: dugong
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|Noun||1.||sirenian mammal - any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs|
aquatic mammal - whales and dolphins; manatees and dugongs; walruses; seals
manatee, Trichechus manatus - sirenian mammal of tropical coastal waters of America; the flat tail is rounded
dugong, Dugong dugon - sirenian tusked mammal found from eastern Africa to Australia; the flat tail is bilobate
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