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Definition of platelets - 4 dictionary results

plate⋅let

[pleyt-lit]
–noun Cell Biology.
a small platelike body, esp. a blood platelet.

Origin:
1890–95; plate 1 + -let
plate·let   (plāt'lĭt)   
n.  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. Also called blood platelet, thrombocyte.

platelets [(playt-luhts)]

Small, flat disks in the blood that aid in clotting.

platelet   (plāt'lĭt)  Pronunciation Key 
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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