[pro″meg-ah-kar´e-o-sīt″] a precursor in the thrombocytic series that is a developmental form intermediate between the megakaryoblast and the megakaryocyte.
promegakaryocyte
(prō-mĕg″ă-kăr′ē-ō-sīt) [″ + megas, big, + karyon, nucleus, + kytos, cell] A cell from which a megakaryocyte develops.