diastole

noun

di·​as·​to·​le dī-ˈa-stə-(ˌ)lē How to pronounce diastole (audio)
: a rhythmically recurrent expansion
especially : the relaxation and dilation of the chambers of the heart and especially the ventricles during which they fill with blood compare systole
diastolic adjective

Examples of diastole in a Sentence

Recent Examples on the Web The participants were hooked up to an electrocardiogram machine to track their heartbeats and allow researchers to flash images at either systole or diastole. Nathaniel Scharping, Discover Magazine, 17 Jan. 2017 When the person in the image was black, participants who had to react during systole were more likely to shoot unarmed individuals, than people primed with the same image during diastole. Nathaniel Scharping, Discover Magazine, 17 Jan. 2017 For us this was diastole; the condition of the heart when it's fully dilated with blood just before it's ejected with a heart contraction to the body. Jennifer Nalewicki, Smithsonian, 21 July 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'diastole.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Greek diastolē dilatation, from diastellein to expand, from dia- + stellein to prepare, send

First Known Use

circa 1578, in the meaning defined above

Time Traveler
The first known use of diastole was circa 1578

Dictionary Entries Near diastole

Cite this Entry

“Diastole.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diastole. Accessed 21 Feb. 2024.

Kids Definition

diastole

noun
di·​as·​to·​le dī-ˈas-tə-(ˌ)lē How to pronounce diastole (audio)
: the relaxation of the heart during which its cavities expand and fill with blood compare systole

Medical Definition

diastole

noun
di·​as·​to·​le dī-ˈas-tə-(ˌ)lē How to pronounce diastole (audio)
1
: the passive rhythmical expansion or dilation of the cavities of the heart during which they fill with blood compare systole
2
: the rhythmical expansion of a pulsating vacuole (as of an amoeba)
diastolic adjective

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