: a minute flattened body (as of ice or a mineral)
especially
: a minute colorless disklike body of mammalian blood that assists in blood clotting by adhering to other platelets and to damaged epithelium
called also blood platelet, thrombocyte
Examples of platelet in a Sentence
Recent Examples on the Web
In the morning, their blood was drawn to measure platelet activity.
—
Caroline Hopkins, NBC News, 8 Aug. 2024
With aspirin, these platelet changes cannot be undone and will remain an issue until new platelets form in seven to 10 days.
—Maxine Lipner, Verywell Health, 19 Oct. 2024
Those participants were also significantly more likely to form blood clots, measured by an increase in platelet aggregation.
—Will Sullivan, Smithsonian Magazine, 14 Aug. 2024
Adults who drank the normal sugar drink had no changes in platelet aggregation.
—Caroline Hopkins, NBC News, 8 Aug. 2024
See all Example Sentences for platelet 
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Caroline Hopkins, NBC News, 8 Aug. 2024
With aspirin, these platelet changes cannot be undone and will remain an issue until new platelets form in seven to 10 days.
—Maxine Lipner, Verywell Health, 19 Oct. 2024
Those participants were also significantly more likely to form blood clots, measured by an increase in platelet aggregation.
—Will Sullivan, Smithsonian Magazine, 14 Aug. 2024
Adults who drank the normal sugar drink had no changes in platelet aggregation.
—Caroline Hopkins, NBC News, 8 Aug. 2024
See all Example Sentences for platelet
Dictionary Entries Near platelet
Cite this Entry
“Platelet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/platelet. Accessed 27 Nov. 2024.
Copy CitationKids Definition
platelet
noun
plate·let
ˈplāt-lət 
: one of the tiny colorless disk-shaped bodies of the blood of mammals that assist in blood clotting
Medical Definition
platelet
noun
plate·let
ˈplāt-lət
: a minute colorless anucleate disklike body of mammalian blood that is derived from fragments of megakaryocyte cytoplasm, that is released from the bone marrow into the blood, and that assists in blood clotting by adhering to other platelets and to damaged epithelium
called also blood platelet, thrombocyte
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