Interaction at short distances between certain subatomic particles mediated by the strong force.
 Example sentencesExamples
-  The electroweak and strong interactions coexist in a combined theory of the fundamental interactions called the standard model.
 -  They are the electromagnetic interaction, the weak interaction and the strong interaction.
 -  Quantum chromodynamics is the theory of the strong interaction that binds protons and neutrons together to form atomic nuclei.
 -  Higgs decided to write an extra paragraph on possible applications to the strong interaction.
 -  Beychok and Warner have observed electrophoretically a strong interaction of lysozyme with chloride.