noun Physics.

an electron emitted from a system by the photoelectric effect.

Origin of photoelectron

First recorded in 1910–15; photo- + electron Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for photoelectron



an electron ejected from an atom, molecule, or solid by an incident photon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

photoelectron in Science



An electron released or ejected from a photoelectric substance, having absorbed energy from incoming light.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.