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[kahr-dee-ak] /ˈkɑr diˌæk/
of or relating to the heart:
cardiac disease.
of or relating to the esophageal portion of the stomach.
Medicine/Medical. a cardiac remedy.
a person suffering from heart disease.
Origin of cardiac
late Middle English
1400-50; late Middle English (< Middle French cardiaque) < Latin cardiacus < Greek kardiakós, equivalent to kardí(a) heart + -akos -ac
Related forms
postcardiac, adjective
precardiac, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for cardiac
  • Coronary angiography is usually done along with cardiac catheterization.
  • Lessons learned from newts, fish, and mutant mice could help humans repair cardiac damage.
  • The city's central hospitals reflect this growth, with new facilities springing up for cancer and cardiac care.
  • Normal cardiac artery walls are about a millimeter thick.
  • The entire history of my research career has revolved around lipid metabolism as it relates to overall cardiac health and disease.
  • Using a robotic biochip, scientists have identified genes involved in an important aspect of cardiac stress.
  • Myocardial biopsy is done during cardiac catheterization or similar procedure.
  • The whole drug-delivery system finishes up as an implantable device no bigger than a cardiac pacemaker.
  • cardiac output is a major limiting factor for prolonged exercise.
  • Five cardiac patients will soon take part in the first artificial heart implant clinical trials.
British Dictionary definitions for cardiac


of or relating to the heart
of or relating to the portion of the stomach connected to the oesophagus
a person with a heart disorder
(obsolete) a drug that stimulates the heart muscle
Word Origin
C17: from Latin cardiacus, from Greek, from kardia heart
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for cardiac

c.1600, from French cardiaque (14c.) or directly from Latin cardiacus, from Greek kardiakos "pertaining to the heart," from kardia "heart" (see heart (n.)). Cardiac arrest is attested from 1950.

Greek kardia also could mean "stomach" and Latin cardiacus "pertaining to the stomach." This terminology continues somewhat in modern medicine. Confusion of heart and nearby digestive organs also is reflected in Breton kalon "heart," from Old French cauldun "bowels," and English heartburn for "indigestion."

Online Etymology Dictionary, © 2010 Douglas Harper
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cardiac in Medicine

cardiac car·di·ac (kär'dē-āk')

  1. Of, near, or relating to the heart.

  2. Of, near, or relating to the cardia.

A person with a heart disorder.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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cardiac in Science
Relating to or involving the heart.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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