order rheiformes

Noun
  1. A ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheas (synset 101523430)
    is a type of: animal order - the order of animals
    member holonym: family rheidae, rheidae - a family of birds coextensive with the order Rheiformes
    belongs to: aves, class aves - (ornithology) the class of birds
    same as: rheiformes

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