Meaning of microphysics

mi•cro•phys•ics

Pronunciation: (mī"kru-fiz'iks), [key]
— n. (used with a sing. v.)
  1. the branch of physics dealing with physical objects that are not large enough to be observed and treated directly, as elementary particles, atoms, and molecules. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.