photo-

US/foʊtoʊ/

prefix

light, electromagnetic radiation

Meanings

Origin

  1. Proto-Indo-European*bʰeh₂-
  2. Proto-Indo-European*bʰéh₂os
  3. Proto-Hellenic*pʰáwos
  4. Ancient Greekφᾰ́ος (phắos)
  5. Ancient Greekφῶς (phôs)
  6. Ancient Greekφωτο- (phōto-)
  7. Englishphoto-

From Ancient Greek φωτο- (phōto-), the combining form of φῶς (phôs, “light”).

Full word history & related roots →

Translations

Catalan foto-
  • foto-light
Czech foto-
  • foto-light
Dutch foto-
  • foto-light
French photo-
  • photo-light
Greek φωτο-
  • φωτο- (foto-)light
Italian foto-
  • foto-light
Norwegian Bokmål foto-
  • foto-light
Polish foto-
  • foto-light
Portuguese foto-, luci-
  • foto-light
  • luci-light
Russian фото-, свето-
  • фото- (foto-)light
  • свето- (sveto-)light
Spanish foto-
  • foto-light
Swedish foto-
  • foto-light
Cite this entry
APA

photo-. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/photo-

MLA

“photo-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/photo-. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “photo-,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/photo-.

Source: photo- on Wiktionary, CC BY-SA 4.0.