car·di·ac (kär'dē-ăk')
adj.

1. Of, near, or relating to the heart: cardiac arteries.
2. Of or relating to the cardia.

n.
A person with a heart disorder.

[Middle English, from Latin cardiacus, from Greek kardiakos, from kardiā, heart.]

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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