An Etymological Dictionary of Astronomy and Astrophysics
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General: The act of confining; the state of being confined. Physics: A property of quantum electrodynamics whereby quarks cannot exist as free particles, but are forever bound into protons, neutrons, etc.

Noun from → confine.

The phenomenon wherein the → quarks are permanently bound together and can never be removed from the → hadrons they compose.

→ quark; → confinement.