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Pronunciation: di'la-tor


  1. An instrument designed to enlarge a hollow structure or opening.
  2. A muscle that pulls open an orifice.
  3. A substance that causes dilation or enlargement of an opening or the lumen of a hollow structure.

Synonym(s): dilatator

See Also: bougie

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.