Definition of "cardiac"

(biology, medicine) Pertaining to the heart.

(biology, medicine) Pertaining to the cardia; cardial (cardial is the usual adjective in this sense).

(medicine, archaic) Exciting action in the heart, through the medium of the stomach; cordial; stimulant.

A person with heart disease.  examples

(dated) Heart disease.  examples

(medicine) A medicine that excites action in the stomach.  examples