variant of extra- (used to contrast with intro-): extrovert.
- extrinsic allergic alveolitis,
- extrinsic eye muscle,
- extrinsic factor,
- extrinsic incubation period,
- extrinsic sphincter,
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Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.