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photocathode

[foh-toh-kath-ohd] /ˌfoʊ toʊˈkæθ oʊd/
noun
1.
a cathode, typically of a cesium or sodium compound, having the property of emitting electrons when activated by light or other radiation.
Origin
1925-1930
1925-30; photo- + cathode
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for photo cathode

photocathode

/ˌfəʊtəʊˈkæθəʊd/
noun
1.
a cathode that undergoes or is used for photoemission
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
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Encyclopedia Article for photo cathode

photocathode

an element of a photoelectric cell (q.v.) that emits electrons when struck by light, making possible the flow of electric current through the device. A substance often used for photocathodes is a partially oxidized silver-cesium alloy.

Learn more about photocathode with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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10
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