variants or photo-
1
: light : radiant energy
photon
photography
2
: photograph : photographic
photoengraving
3
: photoelectric
photocell

Word History

Etymology

Greek phōt-, phōto-, from phōt-, phōs — more at fancy

Dictionary Entries Near phot-

Cite this Entry

“Phot-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phot-. Accessed 28 Mar. 2024.

Kids Definition

phot-

combining form
variants or photo-
1
: light
photon
photography
2
: photograph : photographic
photocopy
3
: photoelectric
photocell
Etymology

from Greek phot-, phos "light"

Medical Definition

phot

noun
: the cgs unit of illumination equal to one lumen per square centimeter
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!