thrombocyte

n. blood platelet

Platelets, or thrombocytes, are the cell fragments circulating in the blood that are involved in the cellular mechanisms of primary hemostasis leading to the formation of blood clots. Dysfunction or low levels of platelets predisposes to bleeding, while high levels, although usually asymptomatic, may increase the risk of thrombosis. An abnormality or disease of the platelets is called a thrombocytopathy.
See more at Wikipedia.org...

Noun
1. tiny bits of protoplasm found in vertebrate blood; essential for blood clotting
(synonym) platelet, blood platelet
(hypernym) protoplasm, living substance

n. (Anatomy) thrombocyte, blood platelet

A platelet. Crucial to normal blood clotting. Although platelets are sometimes classed as blood cells, they are not. They are fragments of a large cell called a megakaryocyte (literally, a large cell).