In chemistry:

• Colloidal particle, part of a one-phase system of two or more components

In physics:

• Subatomic particle, which may be either:
• Elementary particle, a particle of which larger particles are composed, also called a fundamental particle
• Composite particle, a bound state between several elementary particles
• Point particle, an idealized particle that does not have any volume

• See also list of particles

In other contexts:

• Particle (ecology), in marine and freshwater ecology, a small object
• Particulate matter, in the areas of atmospheric physics and air pollution
• Particle (nanotechnology), a small object that behaves as a whole unit in terms of its transport and properties
• Grammatical particle, in linguistics, a useful catch-all lacking a strict definition
• Particle system, in computer graphics, a technique to simulate certain fuzzy phenomena
• Particle (band), a 2000 jam band from Los Angeles, California

See also

• Granular material