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Noun: dilatation  `di-lu'tey-shun
  1. The state of being stretched beyond normal dimensions
    - distension, distention
     
  2. The act of expanding an aperture
    "the dilatation of the pupil of the eye"
    - dilation

Derived forms: dilatations

See also: dilate

Type of: enlargement, expansion, physical condition, physiological condition, physiological state

Encyclopedia: Dilatation