Noun order sirenia has 1 sense
  1. Sirenia, order Sirenia - manatees; dugongs; Stellar's sea cow
    --1 is a kind of animal order
    --1 is a member of Eutheria, subclass Eutheria
    --1 has members:
     sea cow, sirenian mammal, sirenian; Trichechidae, family Trichechidae; Dugongidae, family Dugongidae
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