重力圏 じゅうりょくけん Meanings Noun gravitational sphere (of a celestial body); gravitational field See also: 引力圏 (いんりょくけん). Kanji 重 heavy. Read as ジュウ. 力 power. Read as リョク. 圏 sphere. Read as ケン. Word lists Astronomy Jinuma: Japanese Dictionary · Word lists