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iridokinesis

(ĭr′ĭ-dō-kə-nēsĭs, -kī-, ī′rĭ-)
n.
  1. The movement of the iris in contracting and dilating the pupil.
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Related formsir′i•do•ki•netic (-nĕtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.