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Answer for the clue "Subatomic particle - let hencoop rot ", 13 letters:
photoelectron

Alternative clues for the word photoelectron

Word definitions for photoelectron in dictionaries

WordNet Word definitions in WordNet
n. an electron that is emitted from an atom or molecule by an incident photon

Wiktionary Word definitions in Wiktionary
n. (context physics English) An electron ejected from the surface of a material by the photoelectric effect