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Definition of Theia
1. Noun. (Greek mythology) the Titaness who was mother of Helios and Selene and Eos in ancient mythology.
Definition of Theia
1. Proper noun. (Greek god) A Titan, the sister and wife of Hyperion. ¹
2. Proper noun. (astronomy) A Mars-sized object that may have collided with Earth to produce the moon. ¹
¹ Source: wiktionary.com