Etymology

opto-

Today it means: optical Full definition →

Ancient Greek ὀπτός (optós) ← Proto-Indo-European *h₃ekʷ-
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The story

  1. Proto-Indo-European*h₃ekʷ-
  2. Ancient Greekὄπωπᾰ (ópōpă)
  3. Ancient Greekὀπτός (optós)
  4. English todayopto-

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

Etymology from Wiktionary, CC BY-SA 4.0.