Definitions for hadronˈhæd rɒn
Random House Webster's College Dictionary
any of a group of elementary particles subject to the strong interaction, subdivided into baryons and mesons.
Origin of hadron:
1962; < Gk hadr(ós) thick, bulky + -on1
any elementary particle that interacts strongly with other particles
A strongly interacting particle such as a proton. A particle which is affected by the strong nuclear force. A hadron is composed of quarks.