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To perform or undergo dilation.
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di·late dī-'lāt, 'dī-. vb, di·lat·ed; di·lat·ing vt to enlarge, stretch, or cause to expand <\dilate his pupils with atropine> <the drug \dilates peripheral arteries> vi to become expanded or swollen <the cervix was dilating> <the pupils dilated>
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di·late (diґlāt) to stretch an opening or hollow structure beyond its normal dimensions; cf. distend.Medical dictionary. 2011.