Source : Webster's Revised Unabridged Dictionary (1913)

Cardialgla \Car`di*al"gl*a\, Cardialgy \Car"di*al`gy\, n. [NL.
   cardialgia, fr. Gr. ?; ? heart + ? pain: cf. F. cardialgie.]
   (Med.)
   A burning or gnawing pain, or feeling of distress, referred
   to the region of the heart, accompanied with cardiac
   palpitation; heartburn. It is usually a symptom of
   indigestion.