from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The rhythmic contraction of the heart, especially of the ventricles, by which blood is driven through the aorta and pulmonary artery after each dilation or diastole.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The rhythmic contraction of the heart, by which blood is driven through the arteries.
- n. A shortening of a naturally long vowel.
from the GNU version of the Collaborative International Dictionary of English
- 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; also, the contraction of a rhythmically pulsating contractile vacuole; -- correlative to
from The Century Dictionary and Cyclopedia
- n. In anc. orthoëpy and prosody: Pronunciation of a vowel as short.
- n. The shortening of a vowel or syllable, especially of one usually treated as a long; correption: opposed to diastole or ectasis.
- n. In physiology, the contraction of the heart and arteries for propelling the blood and thus carrying on the circulation.
- n. The contraction of the pulsatile vesicles of infusorians and other protozoans.
- n. [capitalized] In entomology, a genus of hymenopterous insects.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery
Greek sustolē, contraction, from sustellein, to contract; see systaltic.(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin, from Ancient Greek συστολή (sustolē), from συστέλλειν (sustellein, "to contract"), from σύν (sun, "together") + στέλλειν (stellein, "send"). (Wiktionary)