/ ˈfəʊtəʊ; NAmE ˈfoʊtoʊ/ combining form (in nouns, adjectives, verbs and adverbs)
1.
connected with light :
photosynthesis
2.
connected with photography :
photogenic
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WORD ORIGIN
sense 1 from Greek phōs , phōt- light; sense 2, abbreviation of photography .