GNU Collaborative International Dictionary of English

Found one definition

      
Particle physics (?), n. That branch of physics which investigates the nature of matter, and in particular the properties and behavior of the elementary particles (fundamental particles), of which matter is composed.  Included in this field is the more specialized branch of high-energy physics.

[PJC]

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Call, Scala, Scald, Scale, Scall, Scalp, Scaly, Scull, Shall, Skall, Small, Spall, Stall