# Theia

> English word · Proper noun · IPA /ˈθiːə/

## Definitions
1. A Titan, the sister-wife of Hyperion.
2. An Oceanid nymph (daughter of Oceanus and Tethys), the mother of the Cercopes by Oceanus.
3. A hypothesised Mars-sized planet of the early solar system thought to have collided with the Earth to produce the Moon.

## Etymology
Borrowed from Ancient Greek Θεία (Theía).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/theia