Definition of platelet
: 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
The giving process involves taking bone marrow from the iliac crest of the hipbone while the donor is under anesthesia or collecting peripheral blood stem cells in a process similar to donating blood platelets.
European blood banks have been using the system for platelets and plasma for over a decade, and in 2014, the FDA approved the system for use in the US.
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
PLATELET Defined for English Language Learners
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
Definition of platelet for Students
: one of the tiny colorless disk-shaped bodies of the blood that assist in blood clotting
Medical Definition of platelet
: 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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