- 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.
Compare particle physics.
Origin of microphysics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (functioning as singular) the branch of physics concerned with small objects and systems, such as atoms, molecules, nuclei, and elementary particles
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012