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antiarrhythmic

[an-tee-uh-rith-mik, -uh-rith-, an-tahy-]Pharmacology
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adjective
  1. of or relating to any substance that prevents, inhibits, or alleviates heartbeat irregularities.
noun
  1. any such substance, as lidocaine.

Origin of antiarrhythmic

First recorded in 1950–55; anti- + arrhythmic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
antiarrhythmic in Medicine

antiarrhythmic

(ăn′tē-ə-rĭðmĭk, ăn′tī-)
adj.
  1. Preventing or alleviating irregularities in the force or rhythm of the heart.
n.
  1. An antiarrythmic drug.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.