dioptometer

D2I1O1P3T1O1M3E1T1E1R1

noun

An instrument used to measure ocular refraction, in order to prescribe corrective lenses.

OriginEnglish opto- ← Ancient Greek ὀπτός (optós) ← Latin di- →
Scrabble 16
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Meanings

noundioptometer (plural dioptometers)

plural dioptometers

  1. An instrument used to measure ocular refraction, in order to prescribe corrective lenses.

Origin

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Hellenic*dwi-
  4. Ancient Greekδῐ- (dĭ-)
  5. Latindi-
  6. Englishdi-
  7. Ancient Greekὀπτός (optós)
  8. Englishopto-
  9. Englishdioptometer

From di- + opto- + -meter.

Full word history & related roots →
Cite this entry
APA

dioptometer. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/dioptometer

MLA

“dioptometer.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/dioptometer. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “dioptometer,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/dioptometer.

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