also: おうどう
noun
ecliptic
Astronomy term: the apparent path of the Sun on the celestial sphere.
黄道は天球上の太陽の通り道です。
The ecliptic is the path of the Sun on the celestial sphere.
黄道十二星座は黄
The twelve zodiac constellations are arranged along the ecliptic.
From Chinese 黃道 (huángdào), literally 'yellow path', referring to the Sun's path. The reading こうどう is the standard Sino-Japanese on'yomi; おうどう is an alternative on'yomi.