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dilator

[dahy-ley-ter, di-, dahy-ley-] /daɪˈleɪ tər, dɪ-, ˈdaɪ leɪ-/
noun
1.
Anatomy. a muscle that dilates some cavity of the body.
2.
Surgery. an instrument for dilating body canals, orifices, or cavities.
Also, dilater.
Origin
1595-1605
1595-1605; dilate + -or2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for dilater

dilator

/daɪˈleɪtə; dɪ-/
noun
1.
something that dilates an object, esp a surgical instrument for dilating a bodily cavity
2.
a muscle that expands an orifice or dilates an organ
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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dilater in Medicine

dilator di·la·tor (dī-lā'tər, dī'lā'-, dĭ-lā'-)
n.

  1. An instrument or a substance for enlarging a cavity, canal, blood vessel, or opening.

  2. A muscle that dilates an orifice or a body part, such as a blood vessel or the pupil of the eye. Also called dilatator.

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