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cardiac

[kahr-dee-ak]
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adjective
  1. of or relating to the heart: cardiac disease.
  2. of or relating to the esophageal portion of the stomach.
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noun
  1. Medicine/Medical. a cardiac remedy.
  2. a person suffering from heart disease.
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Origin of cardiac

1400–50; late Middle English (< Middle French cardiaque) < Latin cardiacus < Greek kardiakós, equivalent to kardí(a) heart + -akos -ac
Related formspost·car·di·ac, adjectivepre·car·di·ac, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for cardiac

cardiac

adjective
  1. of or relating to the heart
  2. of or relating to the portion of the stomach connected to the oesophagus
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noun
  1. a person with a heart disorder
  2. obsolete a drug that stimulates the heart muscle
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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

Word Origin and History for cardiac

adj.

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."

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Online Etymology Dictionary, © 2010 Douglas Harper

cardiac in Medicine

cardiac

(kärdē-ăk′)
adj.
  1. Of, near, or relating to the heart.
  2. Of, near, or relating to the cardia.
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n.
  1. A person with a heart disorder.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

cardiac in Science

cardiac

[kärdē-ăk′]
  1. Relating to or involving the heart.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.