One who or that which increases speed.

加速者；加速的东西。

Any mechanical attachment or device for increasing speed; specif. in an automobile, the throttle, or leaver which regulates the amount of gasoline fed to the motor.

任何能增加速度的基件；(特指)汽车中节制汽油流入马达之变速器。

Substance that speeds up in a chemical change.

【化】(反应或显像的)催速剂。

Electromagnetic or electrostatic device that imparts high velocities to charged particles and focuses them on a target.

【理】加速器。