|any of a class of elementary particles that have a mass greater than or equal to that of the proton, participate in strong interactions, and have a spin of ½. Baryons are either nucleons or hyperons. The baryon number is the number of baryons in a system minus the number of antibaryons|
|[C20: bary-, from Greek barus heavy + |
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|baryon (bār'ē-ŏn') Pronunciation Key
Any of a family of subatomic particles composed of three quarks or three antiquarks. They are generally more massive than mesons, and interact with each other via the strong force. Baryons form a subclass of hadrons and are subdivided into nucleons and hyperons. Protons and neutrons are baryons. See Table at subatomic particle.