Definitions for "baryon"
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.
a subgroup of hadrons ( particles that interact through the strong nuclear force ) whose decay always conserves barion number
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 .