Rhea

noun

1. Gr. Myth. daughter of Uranus and Gaea, wife of Cronus, and mother of Zeus, Poseidon, Hades, Demeter, Hera, and Hestia: identified with the Roman Ops and the Phrygian Cybele
2. a large satellite of Saturn
3. any of an order (Rheiformes) of large, South American, flightless birds, smaller than an ostrich, having three toes and a feathered head and neck