1873, irregular shortening of rotator (see rotate (v.)), originally in mathematics. Mechanical sense is attested from 1903; specifically of helicopters from 1930.
例文
1. rotor blades on a helicopter
ヘリコプターの回転翼翼翼翼
2.A rotor from the engine makes the wheels of the car turn.
エンジンのホイールはホイールを回転させる。
3.It is best to allow the rotor to rotate freely.
ロータを自由に回転させることが望ましい。
4.The rotor cataracts water over the top of the machines.
回転車は機械の上から水を注入する。
5.Chris Retzler has built a protototype of a machine called the wave rotor .