megakaryocyte
/ˌmɛɡəˈkarɪə(ʊ)sʌɪt/(also megacaryocyte) Physiology
noun
A giant cell with a large, irregularly lobed, polyploid nucleus, which occurs in small numbers in normal bone marrow and gives rise to blood platelets by fragmentation of its cytoplasm.
Origin
Late 19th century. From mega- + karyo- + -cyte; apparently coined by W. H. Howell.