Joe, I think what you are refering to is hadrons. Hadrons are not a single kind of particle but instead is a large class of particles. A hadron is any sub-atomic particle made from quarks.
Baryons contain three quarks while mesons contain only two quarks.
The most well known examples of hadrons are the proton and the neutron. Both of these particles are baryons because they each have three quarks. Protons and neutrons make up the nuclei of all atoms. There are many more kinds of hadrons. There is the pi particle which is a meson and many others.