A proton was a subatomic particle with a positive electric charge. Its' mass was slightly less than that of a neutron.
Brainiac's Proton Shrinker was a shrink ray gun that emitted particles of protons.
The Protonites were an alien race from the 23rd dimension that were made of protonic energy.
- ↑ As seen in The New Adventures of Superman episode Superman Meets Brainiac (1966).
- ↑ As seen in Superman Meets Brainiac (1966).
- ↑ As seen in The Twenty-Third Dimension (1968).