variant of extra- (used to contrast with intro-): extrovert.

Nearby words

  1. extrinsic allergic alveolitis,
  2. extrinsic eye muscle,
  3. extrinsic factor,
  4. extrinsic incubation period,
  5. extrinsic sphincter,
  6. extrorse,
  7. extrorsely,
  8. extrospection,
  9. extroversion,
  10. extrovert

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

Word Origin and History for extro-


word-forming element meaning "outwards," a variant of extra- by influence of intro-.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for extro-



Variant ofextra-

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