Particle - Definition and Overview

A particle is

1. In particle physics, a basic unit of matter or energy.
2. In ecology, a small object of nonbiological kind.
3. In linguistics, a grammatical particle.
4. In computer graphics, an element of a particle system (simulation).
5. In common use: a very small to insignificant amount. See also grain.
6. In music, the band Particle
7. In wave physics Particle displacement
8. In acoustics Sound particle velocity