柯林斯詞典baryon /?b?r???n/ 1. N 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 . Baryons are either nucleons or hyperons. The baryon number is the number of baryons in a system minus the number of antibaryons 重子 返回 baryon劍橋詞典a particle that contains three quarks , especially a neutron or a proton 重子 返回 baryon