We've found 3 phrases for particle (0.178 seconds):

chain reaction »    A nuclear reaction in which particles produced by the fission of one atom trigger fissions of other atoms.

quantum mechanics »    The branch of physics which studies matter and energy at the level of atoms and other elementary particles, and substitutes probabilistic mechanisms for classical Newtonian ones.

screen out »    To use a screen, grate, sieve or similar means to separate large from small objects or particles.

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