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antiarrhythmic

[an-tee-uh-rith -mik, -uh-rith-, an-tahy-] /ˌæn ti əˈrɪð mɪk, -əˈrɪθ-, ˌæn taɪ-/
adjective
1.
of or pertaining to any substance that prevents, inhibits, or alleviates heartbeat irregularities.
noun
2.
any such substance, as lidocaine.
Origin
1950-1955
1950-55; anti- + arrhythmic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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anti-arrhythmic in Medicine

antiarrhythmic an·ti·ar·rhyth·mic (ān'tē-ə-rĭð'mĭk, ān'tī-)
adj.
Preventing or alleviating irregularities in the force or rhythm of the heart. n.
An antiarrhythmic substance, such as lidocaine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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