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Meaning of cardiotonic

car•di•o•ton•ic

Pronunciation: (kär"dē-ō-ton'ik), [key]
— Med. Med.
—adj.
  1. having a tonic effect on the action of the heart.
—n.
  1. a cardiotonic substance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.