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extro-

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

extro- in Medicine

extro-

pref.

Variant ofextra-

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