Noun order nudibranchia has 1 sense
  1. Nudibranchia, order Nudibranchia - comprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slug
    --1 is a kind of animal order
    --1 is a member of Opisthobranchia, subclass Opisthobranchia
    --1 has members:
     sea slug, nudibranch; Aplysiidae, family Aplysiidae, Tethyidae, family Tethyidae; Hermissenda, genus Hermissenda
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