photoelectron

[foh-toh-i-lek-tron]
noun Physics.
an electron emitted from a system by the photoelectric effect.

Origin:
1910–15; photo- + electron

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Collins
World English Dictionary
photoelectron (ˌfəʊtəʊɪˈlɛktrɒn)
 
n
an electron ejected from an atom, molecule, or solid by an incident photon

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
photoelectron   (fō'tō-ĭ-lěk'trŏn')  Pronunciation Key 
An electron released or ejected from a photoelectric substance, having absorbed energy from incoming light.
The American Heritage® Science Dictionary
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Example sentences
As an x-ray enters the chamber it interacts with the gas, producing an energetic photoelectron.
Investigation of free and solvated multiply-charged anions using photoelectron spectroscopy.
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