rhea 
1. smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan • Syn: nandu, Pterocnemia pennata • Hypernyms: ratite, ratite bird, flightless bird • Member Holonyms: Pterocnemia, genus Pterocnemia 2. larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia • Syn: Rhea americana • Hypernyms: ratite, ratite bird, flightless bird • Member Holonyms: genus Rhea
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