Definition of dilatation
1a : the state of being expanded or widened specifically : the condition of being stretched or enlarged beyond normal dimensions especially as a result of overwork, disease, or abnormal relaxation dilatation of the heart Probably one of the most prevalent conditions in sighthounds is dilatation of the stomach … — Asa Mays Pulmonary vascular dilatation contributes to hypoxemia … — Elizabeth Dean
b : the act or action of stretching, widening, or enlarging an organ or part of the body : dilation sense b … balloon dilatation of the affected tubal wall …— Edmond Confino et al.
c : a dilated or enlarged part or formation intestinal dilatations
2 archaic : amplification in writing or speech "… And then he went on in a dilatation on the dumbness of Nature during the season's suspension and torpidity."— Cowden Clarke
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