The crossword puzzle clue today is "Subatomic particle more massive than an electron". To solve this puzzle clue, we look for the similarity crossword puzzle definitions for our clue. Below are the possibilities crossword solution and answer for "Subatomic particle more massive than an electron". Good luck! :).

Similar crossword puzzle definitions:

Unstable subatomic particle;
Elementary particle;
Particle of cosmic radiation;

Try this 4 letters answer: MUON

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