Definitions of dilatation
  1. noun
    the act of expanding an aperture
    synonyms: dilation
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    dilation of blood vessels (especially the arteries)
    reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs
    type of:
    enlargement, expansion
    the act of increasing (something) in size or volume or quantity or scope
  2. noun
    the state of being stretched beyond normal dimensions
    synonyms: distension, distention
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    distension of the abdomen that is caused by the accumulation of gas in the intestines or the peritoneal cavity
    ectasia, ectasis
    dilatation or distension of a hollow organ
    dilatation of the veins associated with the spermatic cord in the testes
    lymphangiectasia, lymphangiectasis
    dilatation of a lymph vessel
    alveolar ectasia
    abnormal enlargement of the air sacs in the lungs
    type of:
    physical condition, physiological condition, physiological state
    the condition or state of the body or bodily functions
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