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Definition of Systole

Babylon English

regular contraction of the heart; shortening of a naturally long syllable (Prosody)
Systole Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(n.)
The shortening of the long syllable.
  
(n.)
The contraction of the heart and arteries by which the blood is forced onward and the circulation kept up; -- correlative to diastole.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
WordNet 2.0

Noun
1. the contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery
(hypernym) pulse, pulsation, heartbeat, beat
(hyponym) extrasystole
Systole Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Systole is the part of the cardiac cycle when the ventricles contract. The term "systole" originates from New Latin, from Ancient Greek συστολή (sustolē), from συστέλλειν (sustellein, "to contract"), from σύν (syn, "together") + στέλλειν (stellein, "send").

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Systole Definition from Medicine Dictionaries & Glossaries
Aging Hearts and Arteries Glossary
The period during a heart beat when the heart muscle contracts and blood is pumped out.
Source: National Institute on Aging