Platelet definition

plātlĭt
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The definition of a platelet is a cell without a nucleus and without hemoglobin that is found in the blood of mammals and is associated with the process of blood clotting.
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Platelets are produced in the bone marrow by budding off of precursor cells known as megakaryocytes.
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They are smaller than a red blood cell.
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Platelets are present in the blood of an adult in the range of 150 to 400 million per milliliter of blood.
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The average lifespan of a platelet is about five to nine days.
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A low platelet count will result in excessive bleeding.
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Production of platelets can be interrupted by a host of processes including diseases, cancer, chemo drugs and viral infections.

An example of a platelet is a small and irregularly-shaped cell fragment.

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A minute, nonnucleated, disklike cytoplasmic body found in the blood plasma of mammals that is derived from a megakaryocyte and functions to promote blood clotting.
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Any of certain round or oval, nonnucleated disks, smaller than a red blood cell and containing no hemoglobin, found in the blood of mammals and associated with the process of blood clotting.
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A minute, nonnucleated, disklike cytoplasmic body found in the blood plasma of mammals that is derived from a megakaryocyte and functions to promote blood clotting.
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Any of the numerous small, round cell fragments found in the blood of mammals that function in the clotting of blood. Platelets contain no nuclei and are formed in the bone marrow from precursor cells called megakaryocytes . Platelets contribute to the coagulation process by adhering to damaged blood vessels, fibrinogen, and other platelets. An inadequate number of platelets leads to uncontrolled bleeding.
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(hematology, cytology) A small colorless disk-shaped particle found in the blood of mammals, which plays an important role in the formation of blood clots.
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Other Word Forms

Noun

Singular:
platelet
Plural:
platelets