Penetrating Form of Electromagnetic Radiation
This page is the CodyCross answer for the clue below from Sports, Group 142, Puzzle 3 (Freestyle Swimming).
Question is: Penetrating Form of Electromagnetic Radiation
and the answer is: GAMMARAY
Word Meaning:
GAMMA RAY — Very high frequency (and therefore very high energy) electromagnetic radiation emitted as a consequence of radioactivity.
Definitions from Wiktionary.