Skip to Content
Medical Term:


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

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