platelet

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noun plate·let \ˈplāt-lət\

Definition of platelet

  1. :  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

Recent Examples of platelet from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'platelet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of platelet

1888


PLATELET Defined for English Language Learners

platelet

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noun

Definition of platelet for English Language Learners

  • : a small, round, thin blood cell that helps blood to stop flowing from a cut by becoming thick and sticky


PLATELET Defined for Kids

platelet

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noun plate·let \ˈplāt-lət\

Definition of platelet for Students

  1. :  one of the tiny colorless disk-shaped bodies of the blood that assist in blood clotting


Medical Dictionary

platelet

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noun plate·let \ˈplāt-lət\

Medical Definition of platelet

  1. :  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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