Rhea
WordNet
noun
(1) Larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
(2) Smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan
(3) Fertility goddess in ancient Greek mythology; wife of Cronus and mother of Zeus; identified with Roman Ops and Cybele of ancient Asia Minor