• WordNet 3.6
    • n diastole the widening of the chambers of the heart between two contractions when the chambers fill with blood
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Webster's Revised Unabridged Dictionary
    • Diastole (Gram) A figure by which a syllable naturally short is made long.
    • Diastole (Physiol) The rhythmical expansion or dilatation of the heart and arteries; -- correlative to systole, or contraction.
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Century Dictionary and Cyclopedia
    • n diastole The normal rhythmical dilatation or relaxation of the heart or other blood-vessel, which alternates with systole or contraction, the two movements together constituting pulsation or beating: as, auricular diastole; ventricular diastole. The term is also extended to some other pulsating organs, as lymph-hearts, and specifically to the expanding action of the contractile vesicle of infusorians and other protozoans.
    • n diastole The period or length of time during which a rhythmically pulsating vessel is relaxed or dilated; the time-interval which alternates with systole.
    • n diastole In Greek grammar, a mark similar in position and shape to a comma, but originally semicircular in form, used to indicate the correct separation of words, and guard against a false division, such as might pervert the sense. Such a sign was needed to obviate the confusion arising from the ancient practice of writing without division between words. The diastole is still occasionally used, generally in order to distinguish the pronominal forms ο%36τι and ο%36τε, ‘whatever, which,’ from the particles ο%36τι, ‘that,’ and ο%36τε, ‘when.’ The usual practice at present, however, is to use a space instead of the diastole. When the present shape of the comma came into use, more or less confusion between it and the diastole necessarily ensued. Also called hypodiastole. See hyphen.
    • n diastole In ancient prosody, lengthening or protraction of a syllable regularly short; especially, protraction of a syllable preceding a pause or taking the ictus: as
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Chambers's Twentieth Century Dictionary
    • n Diastole dī-as′to-lē dilation of the heart, auricles, and arteries—opp. to Systole, or contraction of the same: the protracting of a short syllable, as before a pause
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Webster's Revised Unabridged Dictionary
L., fr. Gr. , fr. to put asunder, to separate; dia` through + to set, to place
Chambers's Twentieth Century Dictionary
Gr. diastolēdia, asunder, and stellein, to place.


In literature:

Systole, diastole, swift and ever swifter goes the Axe of Samson.
"The French Revolution" by Thomas Carlyle
Yet the systole and diastole of the heart are not without their analogy in the ebb and flow of love.
"Essays, First Series" by Ralph Waldo Emerson
An alternating systole and diastole, says physiology.
"Shandygaff" by Christopher Morley
This change of the colour of the wall he well ascribes to the compression of the retina by the diastole of the artery.
"Zoonomia, Vol. I" by Erasmus Darwin
It was the systole and diastole of the Base.
"Leaves from a Field Note-Book" by J. H. Morgan
These are very slow to fill and grow to a large size before diastole.
"Marine Protozoa from Woods Hole" by Gary N. Calkins
Blood pressure 125 to 130 systolic; 115 to 120 diastolic.
"The Attempted Assassination of ex-President Theodore Roosevelt" by Oliver Remey
Whence the motion, which is generally regarded as the diastole of the heart, is in truth its systole.
"The World's Greatest Books - Volume 15 - Science" by Various
London, that immense heart, with its systole and diastole, its ebb and flow and putrefying growth, lay beating behind me.
"Aliens" by William McFee
It is a continual systole and diastole, an inspiration and an expiration of the living soul.
"Maxims and Reflections" by Johann Wolfgang von Goethe

In poetry:

To batter down resistance, fall again
Stroke after stroke, insistent diastole,
The bitter blows of truth, until the whole
Is hammered into fact made strangely plain.
"The End" by Amy Lowell

In news:

I started medication when I had consistent readings in the high 130s and low 140s for systolic and 85 to 90 for diastolic.
What is the lowest acceptable diastolic blood pressure (BP) in an elderly patient who is being treated for systolic hypertension.
In addition, the evaluation of RV diastolic function may be included in the report.
Exercising at least 4 times a week can increase left ventricular (LV) mass and preserve elasticity, thereby reducing the risk of diastolic heart failure.

In science:

Diastolic inequalities and isoperimetric inequalities on surfaces. to appear in Ann.
Simple closed geodesics and the study of Teichm\"uller spaces
There are seven potential predictors of diabetes recorded for this group; number of pregnancies (NP); plasma glucose concentration (PGC); diastolic blood pressure (BP); triceps skin fold thickness (TST); body mass index (BMI); diabetes pedigree function (DP) and age (AGE).
Estimating the evidence -- a review
This method finds specific utility in cardiac and cardio-cerebral imaging by using fast spin echo sequences which can exploit the spin saturation differences between systole and diastole .
A Quantum Mechanical Review of Magnetic Resonance Imaging