The subatomic level is the smallest level of the universe that we can see or measure. At the subatomic level, particles like atoms are still moving around.

  • The subatomic particles were moving so quickly that they couldn't be seen.

Definition of subatomic


of smaller than atomic dimensions


of or relating to constituents of the atom or forces within the atom

Nearby Words

subatomic Pronunciation in a video (3)

Example Sentences for subatomic

  • 1

    It ranges in scale from the subatomic to the cosmic.

  • 2

    Mass is energy, so the subatomic world is always restlessly in motion.

  • 3

    An electron is a subatomic particle.

  • 4

    A proton is a subatomic particle.

  • 5

    The boson is a subatomic particle.

  • 6

    Atoms are made of subatomic particles.

  • 7

    Not subatomic, not even chemical, and not interstellar.

  • 8

    Timeline of atomic and subatomic physics.

  • 9

    As a result, the amount of medicine is on the subatomic level.

  • 10

    Aston speculated about the subatomic energy and the use of it in 1936.