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Pronunciation: im'po-tens, -ten-se


  1. Weakness; lack of power.
  2. Specifically, inability of the male to achieve or maintain penile erection and thus engage in copulation; a manifestation of neurologic, vascular, or psychological dysfunction.

[L. impotentia, inability, fr. in- neg. + potentia, power]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.