accelerator
/əkˈseləreɪtə(r)/noun
1- something which brings about acceleration, in particular加速之物, 尤指：
1.1
- a device, typically a foot pedal, which controls the speed of a vehicle's engine油门。
1.2
- Physics an apparatus for accelerating charged particles to high velocities【物理】（使带电粒子加速的）加速器。
1.3
- a substance that speeds up a chemical process, typically the vulcanization of rubber or the curing of a plastic（化学过程的）加速剂; 促进剂（尤指橡胶硫化或塑料固化剂）。
1.4
- Computing short for ACCELERATOR BOARD.【计算机】ACCELERATOR BOARD的简称。