地動説 ちどうせつ Meanings Noun heliocentric theory; Copernican theory; heliocentrism; heliocentricism See also: 天動説 (てんどうせつ). Kanji 地 land. Read as チ. 動 move. Read as ドウ. 説 explain. Read as セツ. Jinuma: Japanese Dictionary · Word lists