円軌道(えんきどう) えんきどう noun circular orbit science 1. circular orbit An orbit shaped like a circle, in which a body keeps a roughly constant distance from the object it orbits. 衛星(えいせい)が円軌道(えんきどう)を描(えが)く。🔊 The satellite traces a circular orbit. 人工衛星(じんこうえいせい)を円軌道(えんきどう)に乗(の)せる。🔊 To put an artificial satellite into a circular orbit. この惑星(わくせい)はほぼ円軌道(えんきどう)で太陽(たいよう)の周(まわ)りを回(まわ)っている。🔊 This planet moves around the sun in a nearly circular orbit. Usage: 円軌道(えんきどう) is a circular orbit, contrasted with an elliptical one. It combines 円(えん) (circle) with 軌道(きどう) (orbit).Common collocations円軌道(えんきどう)を描(えが)く: to trace a circular orbit円軌道(えんきどう)に乗(の)せる: to place into a circular orbitSimilar words楕円軌道(だえんきどう): elliptical orbit — the distance varies静止軌道(せいしきどう): geostationary orbit Related Words Related: 軌道(きどう) (orbit; trajectory) Compare: 静止軌道(せいしきどう) (geostationary orbit) general Added 2026.7.2 3:18 · Revised 2026.9.2 13:02 29500/29617_enkidou