antiarrhythmic an·ti·ar·rhyth·mic (ān'tē-ə-rĭ&phonth;'mĭk, ān'tī-)
Preventing or alleviating irregularities in the force or rhythm of the heart. n.
An antiarrhythmic substance, such as lidocaine.
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|