An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

Of, relating to, or being smaller than the atom; of or relating to the inside of the atom.

→ sub-; → atomic.

Any particle that is small compared to the size of the atom, e.g. an electron, proton, neutron, neutrino, quark, meson, all of which are either bosons or fermions.

→ subatomic; → particle.