Definition that contains atomic particle
- string (cosmology) a hypothetical one-dimensional subatomic particle having a concentration of energy and the dynamic properties of a flexible loop
- wimp a hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation; postulated as a constituent of the dark matter of the universe
- powell English physicist who discovered the pion (the first known meson) which is a subatomic particle involved in holding the nucleus together (1903-1969)
- glaser United States physicist who invented the bubble chamber to study subatomic particles (born in 1926)
- gell-mann United States physicist noted for his studies of subatomic particles (born in 1929)
- dark matter (cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force
- murray gell-mann United States physicist noted for his studies of subatomic particles (born in 1929)
- cecil frank powell English physicist who discovered the pion (the first known meson) which is a subatomic particle involved in holding the nucleus together (1903-1969)
- string theory (particle physics) a theory that postulates that subatomic particles are one-dimensional strings
- donald arthur glaser United States physicist who invented the bubble chamber to study subatomic particles (born in 1926)