D defs.my
Entry 1 sense Webster, 1913

Subatom

· Sub·at·om · IPA
01 n. A hypothetical component of a chemical atom, on the theory that the elements themselves are complex substances; -- called also atomicule.
  1. 1.
    A hypothetical component of a chemical atom, on the theory that the elements themselves are complex substances; -- called also atomicule.(Chem.) Also: atomicule