Definition of Rheiformes
1. Noun. A ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheas.
Generic synonyms: Animal Order
Group relationships: Aves, Class Aves
Member holonyms: Family Rheidae, Rheidae
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Lexicographical Neighbors of Rheiformes
Literary usage of Rheiformes
Below you will find example usage of this term as found in modern and/or classical literature:
1. Vertebrate Zoölogy by Horatio Hackett Newman (1920)
"The Rheas (Rheiformes).—The rheas are much like the ostriches in general appearance and in habits, but are smaller and less highly specialized for running. ..."