rheaPronunciation: /ˈriːə/Definition of rhea noun a large flightless bird of South American grasslands, resembling a small ostrich with greyish-brown plumage. Family Rheidae: two species, Rhea americana and Pterocnemia pennata Origin: early 19th century: modern Latin (genus name), from the name of the Titan Rhearhea in other Oxford dictionaries Definition of rhea in the US English dictionary
