or di·lat·er

[dahy-ley-ter, di-, dahy-ley-]


Anatomy. a muscle that dilates some cavity of the body.
Surgery. an instrument for dilating body canals, orifices, or cavities.

Origin of dilator

First recorded in 1595–1605; dilate + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dilator

Historical Examples of dilator

British Dictionary definitions for dilator


dilater dilatator (ˌdaɪləˈteɪtə, ˌdɪ-)


something that dilates an object, esp a surgical instrument for dilating a bodily cavity
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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

dilator in Medicine


[dī-lātər, dīlā′-, dĭ-lā-]


An instrument or a substance for enlarging a cavity, canal, blood vessel, or opening.
A muscle that dilates an orifice or a body part, such as a blood vessel or the pupil of the eye.dilatator
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.