| subatomic particle n. Any of various units of matter below the size of an atom, including the elementary particles and hadrons. |   |
subatomic particle (s b  -t m  k) Any of various particles of matter that are smaller than a hydrogen atom. Protons, neutrons, and electrons are subatomic particles, as are all hadrons and leptons. See also composite particleelementary particle |  anatomy of a lithium atom  |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | subatomic particle - a body having finite mass and internal structure but negligible dimensions virion - (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses) alpha particle - a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes beta particle - a high-speed electron or positron emitted in the decay of a radioactive isotope body - an individual 3-dimensional object that has mass and that is distinguishable from other objects; "heavenly body" boson - any particle that obeys Bose-Einstein statistics but not the Pauli exclusion principle; all nuclei with an even mass number are bosons deuteron - the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators elementary particle, fundamental particle - (physics) a particle that is less complex than an atom; regarded as constituents of all matter fermion - any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle ion - a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons magnetic monopole - a hypothetical particle with a single magnetic pole instead of the usual two micelle - an electrically charged particle built up from polymeric molecules or ions and occurring in certain colloidal electrolytic solutions like soaps and detergents prion - (microbiology) an infectious protein particle similar to a virus but lacking nucleic acid; thought to be the agent responsible for scrapie and other degenerative diseases of the nervous system virino - (microbiology) a hypothetical infectious particle thought to be the cause of scrapie and other degenerative diseases of the central nervous system; consists of nucleic acid in a protective coat of host cell proteins scintilla - a sparkling glittering particle superstring - a hypothetical particle that is the elementary particle in a theory of space-time thermion - an electrically charged particle (electron or ion) emitted by a substance at a high temperature |
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