noun
elliptical orbit
Technical term in astronomy for an orbit shaped like an ellipse, as opposed to a perfect circle.
惑星は太陽の周りを楕円軌道で回っている。
Planets revolve around the sun in elliptical orbits.
A circular orbit, while 楕円軌道 is an elliptical orbit.
Compound of 楕円 (ellipse) and 軌道 (orbit).