火卫一 Traditional form: 火衛一 Pinyin (reading): Huǒwèi Yī Definitions: Phobos (moon of Mars), aka Mars I Characters: 火 - fire, flame; to burn; anger, rage 卫 - to guard, to protect, to defend 一 - one; a, an; alone Traditional characters: 火 - fire, flame; to burn; anger, rage 衛 - to guard, to protect, to defend 一 - one; a, an; alone