a combining form meaning “optic” or “vision,” used in the formation of compound words: optometry.

Nearby words

  1. option,
  2. option money,
  3. optional,
  4. optionally,
  5. optionee,
  6. optoelectronics,
  7. optokinetic,
  8. optometer,
  9. optometrical,
  10. optometrist

Origin of opto-

< Greek optós visible; akin to ṓps face; cf. eye

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for opto-



Eye; vision:optometry.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.