dilation

Part of speech: noun

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Usage examples "dilation":

  1. The persistent efforts of the count's intellect, his muscular rigidity alternating with utter relaxation, the dilation of the pupils of his eyes, and more than aught else the violence of his last convulsions, have led me to ask myself if some criminal had not hastened his end. - "Baron Trigault's Vengeance Volume 2 (of 2)", Emile Gaboriau.
  2. The fall of the mercury in the barometer was scarcely perceptible when the dilation of the hydrogen gas in the balloon had become considerable. - "Wonderful Balloon Ascents or, the Conquest of the Skies", Fulgence Marion.