dilator Hear it!

dilator definition

di·la·tor (dī′lāt′ər; dī lāt′-, də-)

noun

a person or thing that dilates; specif.,
  1. any muscle that dilates a part of the body
  2. a surgical instrument for dilating an opening, wound, etc.

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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