Enter a clue or pattern or both:
The Clue
Of pions and kaons (7 letter answer)
The Answer
MESONIC
Tags
Notes
The answer MESONIC is so rare that it appears less than once every 2500 puzzles.
Definition
MESONIC as an adjective:
1. (mesonic, mesic) = of or pertaining to a meson; "the radii of the mesic orbits"- Lawrence Wilets