Word of the Day: Dilatation - definition of dilatation by The Free Dictionary

thefreedictionary.com/dilatation

1. a dilated formation or part.
2. an abnormal enlargement of an organ, aperture, or canal of the body.
3.
a. an enlargement made in a body aperture or canal for surgical or medicaltreatment.
b. a restoration to normal patency of an abnormally small body opening orpassageway.