: 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
Sixty-one-year-old Brennan has now donated blood, platelets, and plasma over 500 times.
—
Abigail Wilt, Southern Living, 13 May 2024
Buy Now on Boka: $70 The Innovation Award: Plated Skin Science Hair Serum
Photo : Plated
The proprietary complex in this serum summons platelet extract—exosomes derived from human blood—to supercharge your follicles and harmonize your scalp.
—Adam Hurly, Robb Report, 8 May 2024
See all Example Sentences for platelet 
Abigail Wilt, Southern Living, 13 May 2024
Buy Now on Boka: $70 The Innovation Award: Plated Skin Science Hair Serum
Photo : Plated
The proprietary complex in this serum summons platelet extract—exosomes derived from human blood—to supercharge your follicles and harmonize your scalp.
—Adam Hurly, Robb Report, 8 May 2024
See all Example Sentences for platelet
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'platelet.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Platelet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/platelet. Accessed 29 May. 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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