1. the act of dilating; state of being dilated.
  2. dilatation.

1590s, formed from dilate on the mistaken assumption that the -ate in that word was the Latin verbal suffix (it is instead part of the stem); the proper form, dilatation, is older (c.1400).


  1. The act of expanding or the condition of being expanded.
  2. Dilatation.

  1. The widening or stretching of an opening or a hollow structure in the body.

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