subatomic particle
nounUK /ˌsʌb.əˈtɒm.ɪk ˈpɑː.tɪ.kəl/
US /ˌsʌb.əˈtɑː.mɪk ˈpɑːr.tɪ.kəl/
A subatomic particle is a tiny piece that is even smaller than an atom.
Electrons and protons are examples of subatomic particles.
OTHER MEANINGS
2. A particle smaller than an atom, such as a proton, neutron, or electron.
Scientists study subatomic particles to understand how matter is built.
3. Any of the fundamental constituents of matter described by particle physics.
The Large Hadron Collider smashes subatomic particles together at high speeds.
4. A tiny unit of matter that makes up atoms and can carry charge or mass.
A subatomic particle like the electron orbits the nucleus of an atom.