noun
a ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheas
• Syn: ↑Rheiformes
• Hypernyms: ↑animal order
• Member Holonyms: ↑Aves, ↑class Aves
• Member Meronyms: ↑Rheidae, ↑family Rheidae
Useful english dictionary. 2012.