Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


 (dī-lā′tər, dī′lā′-, dĭ-lā′-)
1. A muscle that dilates a body part, such as a blood vessel or the pupil of the eye.
2. An instrument that dilates a body part, such as a cavity, canal, or orifice.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(daɪˈleɪtə; dɪ-) or




(ˌdaɪləˈteɪtə; ˌdɪ-)
1. (Surgery) something that dilates an object, esp a surgical instrument for dilating a bodily cavity
2. (Physiology) a muscle that expands an orifice or dilates an organ
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


or di•lat•er

(daɪˈleɪ tər, dɪ-, ˈdaɪ leɪ-)

1. any muscle that dilates a part of the body.
2. a surgical instrument for performing a dilatation.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dilator - a muscle or nerve that dilates or widens a body part
body part - any part of an organism such as an organ or extremity
2.dilator - a drug that causes dilation
drug - a substance that is used as a medicine or narcotic
vasodilative, vasodilator - a drug that causes dilation of blood vessels
3.dilator - a surgical instrument that is used to dilate or distend an opening or an organ
surgical instrument - a medical instrument used in surgery
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


n. dilatador.
1. músculo que dilata un órgano al contraerse;
2. instrumento quirúrgico para expandir o dilatar un orificio o paredes;
Hegar's ______ de Hegar, instrumento usado para dilatar el canal uterino.
English-Spanish Medical Dictionary © Farlex 2012


n dilatador m
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
After 30 days, the patient began twice-a-week maintenance with the creams and also began to use vaginal dilators. After success inserting a size extra large dilator following 5 months of dilator use, she was able to resume intercourse without tearing.
The transseptal sheath/dilator was placed in the superior vena cava and then the dilator, sheath and needle combination was withdrawn inferiorly in the PA projection until the tip of the dilator "popped" into the fossa ovalis.
The failures resulted from organ damage (2) and inability to insert over-the-wire balloon dilator into gastric puncture (3).
9 November 2011 - Boston Scientific Corporation (NYSE:BSX) has received CE Mark for the use of its Wireguided Balloon Dilator for endoscopic dilation of the Sphincter of Oddi following sphincterotomy.
According to reports, three separate horses, including two owned by the Maktoums - Liston and Hatheer - tested positive for trace levels of the prohibited bronchial dilator ipratropium.
Researchers suggest that the underlying reason for the improved accommodation ability may be due to the positively activated functions of three muscles in the eye: the constrictor pupillae muscle and dilator pupillae muscle working in coordination with the ciliary muscle.
The one-size-fits-all, V-shaped dilator with oval ends is designed to fit comfortably onto the nose.
The guidewire, dilator, and guiding catheter were visualized within the tracheal lumen throughout the procedure, but on insertion of the tracheotomy tube, the tube position within the lumen could not be confirmed.
She was in agony when doctors left a vaginal dilator inside her after the procedure.
Taking deep breaths helps transport a potent lung and blood vessel dilator called nitric oxide from nasal passages to your lungs.
It also raised dilator reserve by 83% in ischemic areas without affecting dilator reserve in normal areas.