dilatation: Meaning and Definition of

dil•a•ta•tion

1. a dilated formation or part.
2. an abnormal enlargement of an aperture or a canal of the body.
1. an enlargement made in a body aperture or canal for surgical or medical treatment.
2. a restoration to normal patency of an abnormally small body opening or passageway, as of the anus or esophagus.
4. the increase in volume per unit volume of a homogeneous substance.