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A unit of illumination equal to one lumen per square centimeter.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Units) a unit of illumination equal to one lumen per square centimetre. 1 phot is equal to 10 000 lux
[C20: from Greek phōs light]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a unit of illumination, equal to one lumen per square centimeter. Abbr.: ph
[1915–20; < Greek phōt-, s. of phôs (contraction of pháos) light]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||phot - a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux|
illumination unit - a measure of illumination
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