Main Entry: mega·kary·o·cyte Pronunciation: "meg-&-'kar-E-O-"sIt Function: noun : a large cell that has a lobulated nucleus, isfound especially in the bone marrow, and is the source of blood platelets —mega·kary·o·cyt·ic/-O-"sit-ik/adjective
megakaryocyte meg·a·kar·y·o·cyte (měg'ə-kār'ē-ə-sīt') n. A large bone marrow cell with a lobulate nucleus that gives rise to blood platelets. Also called megalokaryocyte.