Synonyms for atom

noun

1. Tiny particle

   fragment, mite, speck, particle, iota, mote, jot, grain, scintilla; see also bit 1.

2. Particle in atomic physics

   the smallest particle of an element, molecule*, smallest quantity of a radical, basic unit, basic constituent, irreducible unit, irreducible constituent, atomic mass unit. see also atomic energy, element 2.

   Parts and forms of atoms include: electron, proton, neutron, positron, neutrino, positive electron, neutral electron, nuclide quark;