粒子加速器 lìzǐjiāsùqì particle accelerator Origin Definitions Defs Strokes Stroke Words Sentences Sents 粒子 lìzǐ noun particle (physics) a subatomic or elementary particle, such as an electron or photon; the fundamental constituents of matter加速器 jiāsùqì noun accelerator A device used to increase the speed and energy of particles, such as a particle accelerator; also used in computing to speed up processes.