potency - definition and synonyms

noun 

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/ˈpəʊt(ə)nsi/
singularpotency
pluralpotencies
  1. 1
    [countable] the strength of a medicine, drug, or chemical

    Improper storage may decrease the potency of the drug.

  2. 2
    [uncountable] the physical ability of a man to have sex
     Synonyms and related words