Word.ws English Dictionary

opto-

opto- prefix: optical.

Prefix

opto-

  1. optical

Origin of opto-

From Ancient Greek ὀπτός (optós, “sight, seen, visible”), from ὄψεσθαι (ópsesthai, “to be going to see”).

Questions about opto-

What does opto- mean?
Opto- means optical.
What part of speech is opto-?
Opto- is a prefix.

Words near opto- in the dictionary

  1. optionors
  2. options
  3. optique
  4. optivar
  5. OPTO
  6. opto-
  7. opto-interrupter
  8. opto-isolator
  9. optoacoustic
  10. optoacoustically
  11. optoacoustics

Source and license

Adapted from Wiktionary: opto- (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “opto-.” Word.ws, https://word.ws/opto-. Based on Wiktionary, CC BY-SA 4.0.