遊星歯車 ゆうせいはぐるま Meanings Noun planetary gear; planetary wheel Kanji 遊 play. Read as ユウ. 星 star. Read as セイ. 歯 tooth 車 car. Read as くるま. Words containing 遊星歯車 遊星歯車装置 (ゆうせいはぐるまそうち) planetary gear Jinuma: Japanese Dictionary · Word lists