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.

Penetrating form of electromagnetic radiation — CodyCross Answer | CodyCross Solutions