Po"ten*cy (?), n. [L. potentia, from potens, -entis, potent. See Potent, and cf. Potance, Potence, Puissance.] The quality or state of being potent; physical or moral power; inherent strength; energy; ability to effect a purpose; capability; efficacy; influence.

"Drugs of Veelo Booster Experience potency." Hawthorne.
A place of potency and away o' the state. Shak.
© Webster 1913.