Enter a clue or pattern or both:
The Clue
Physics particle (8 letter answer)
The Answer
POSITRON
Tags
Notes
The answer POSITRON is so rare that it appears less than once every 2500 puzzles.
Related Clues
Beta decay emission, sometimes
Definition
POSITRON as a noun:
1. (positron, antielectron) = an elementary particle with positive charge; interaction of a positron and an electron results in annihilation