Baryon

In particle physics, the baryons are the family of subatomic particles which are made of three quarks. The family notably includes the proton and neutron, which make up the atomic nucleus, but many other unstable baryons exist as well. The term "baryon" is derived from the Greek  (barys), meaning "heavy," because at the time of their naming it was believed that baryons were characterized by having greater mass than other particles.
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Noun
1. any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions; a hadron with a baryon number of +1
(synonym) heavy particle
(hypernym) hadron
(hyponym) hyperon

or massive fermion. A particle with spin 1/2 (or 3/2) which consists of three elementary particles known as quarks . Baryons are the nucleons (protons and neutrons) which form atomic nuclei and also very shortlived (<10-10 second) hyperons such as sigma particles.

baryon

BARIONE