(Greek mythology) A Titan, the daughter of Uranus and Gaia, the mother of Demeter, Hades, Hera, Hestia, Poseidon, and Zeus.
(astronomy) Saturn V, one of the moons of Saturn.
(astronomy) The asteroid 577 Rhea.
A large flightless bird of the genus Rhea, native to South America.
Ramie (Boehmeria nivea), a fiber-yielding plant.