We know about quarks. The combination of three quarks made a sub-atomic particles that is called baryon. Baryon is an element of hardon family. Just like baryon, messon is also a member of hardon family.
The word baryon comes from greek. Baryon means heavy. When it was named as baryon then it was higher mass than most of the existed elementary particles.
Baryon is special types of quark based elementary particles that participates in strong interaction, though another quark based particles lepton do not participate in strong interaction.
