English Explanatory Dictionary

opto-

English dictionary entry

Meanings

prefix
  1. optical

Word forms

opto-

Etymology

Etymology tree Proto-Indo-European *h₃ekʷ-der. Ancient Greek ὄπωπᾰ (ópōpă) Proto-Indo-European *-tós Proto-Hellenic *-tós Ancient Greek -τός (-tós) Ancient Greek ὀπτός (optós)der. English opto- From Ancient Greek ὀπτός (optós, “sight, seen, visible”), from ὄψεσθαι (ópsesthai, “to be going to see”).

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