noun
: an irregularity of the heartbeat in which the contractions of the auricle exceed in number those of the ventricle — compare auricular fibrillation
noun
: an irregularity of the heartbeat in which the contractions of the auricle exceed in number those of the ventricle — compare auricular fibrillation
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012