photoelectric effect

noun Physics.
the phenomenon in which the absorption of electromagnetic radiation, as light, of sufficiently high frequency by a surface, usually metallic, induces the emission of electrons from the surface.
Also called photoemission.

1890–95 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
photoelectric effect
1.  the ejection of electrons from a solid by an incident beam of sufficiently energetic electromagnetic radiation
2.  any phenomenon involving electricity and electromagnetic radiation, such as photoemission

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
photoelectric effect  
The emission of electrons from a material, such as a metal, as a result of being struck by photons. Some substances, such as selenium, are particularly susceptible to this effect. The photoelectric effect is used in photoelectric and solar cells to create an electric potential. Also called photoemission.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

photoelectric effect definition

The emission of electrons from a metal when light shines on it. The effect is widely used to convert a light signal into an electric current.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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