| 読み | しごせん |
|---|---|
| 品詞 | 名詞 |
| カテゴリ |
(1)an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator; "all points on the same meridian have the same longitude"
(2)南極と北極を通り、赤道と直角に交わる、地表の想像上の大円
(1)all points on the same meridian have the same longitude
(2)同じ子午線上の点はすべて同じ経度である