say it: REE-uh
rhea is a noun meaning "fertility goddess in ancient Greek mythology; wife of Cronus and mother of Zeus; identified with Roman Ops and Cybele of ancient Asia Minor". It carries 3 recorded senses.
smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan
larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for rhea come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.