The smallest, most basic unit of thought, analogous to the atom in matter. From "Gulf" by Robert A. Heinlein (in _Assignment in Eternity_)
The fastest possible rate of thought is one psychon per chronon.
A person who is as crazy as a psycho and as ugly as a cyclops.
Nick: "You're a psychon."
Ali: "What's a psychon?"
Nick: "Look in the mirror, Ali."