An elementary particle, also known as a fundamental particle in particle physics, is a subatomic particle that is not made up of other particles.
The fundamental fermions (quarks, leptons, antiquarks, and antileptons), which are generally "matter particles" and "antimatter particles," as well as the fundamental bosons (gauge bosons and the Higgs boson), which are generally "force particles" that mediate interactions among fermions, are currently thought to be elementary particles.
A composite particle is one that contains two or more elementary particles.