extrasystole
ext·ra·sys·tole
noun
1.
a premature systole resulting in a momentary cardiac arrhythmia
Origin
From extra- + systole.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.