Dictionarysys•to•lePronunciation: (sis'tu-lē", -lē), [key] —n. 1. Physiol.the normal rhythmical contraction of the heart, during which the blood in the chambers is forced onward. Cf. diastole. 2. Class. Pros.the shortening of a syllable regularly long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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