Mobile Synergy of Electron and Hole in a Crystal
This page is the CodyCross answer for the clue below from Germany, Group 2194, Puzzle 4 (Pretzels and Mustard).
Question is: Mobile Synergy of Electron and Hole in a Crystal
and the answer is: EXCITON
Word Meaning:
EXCITON — (physics) A bound state of an electron and an electron hole in an insulator or semiconductor
Definitions from Wiktionary.