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photo-(word root) light
Examples of words with the root photo-: photochemical
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
1. Light; radiant energy: photosynthesis.
2. Photographic: photomontage.
3. Photoelectric: photoemission.
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.
1. of, relating to, or produced by light: photosynthesis.
2. (Photography) indicating a photographic process: photolithography.
[from Greek phōs, phōt- light]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n., pl. -tos.
[1855–60; by shortening]
a combining form meaning “light” (photobiology); also used to represent photographic or photograph: photocopy.
[< Greek, comb. form of phôs (genitive phōtós)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A prefix that means "light," as in photoreceptor.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.