from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A large bone marrow cell with a lobulate nucleus that gives rise to blood platelets.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A large cell, found in bone marrow, responsible for the production of platelets.
from the GNU version of the Collaborative International Dictionary of English
- n. A large bone marrow cell not usually found in the circulating blood; it is regarded as the precursors of blood platelets; it is up to 100 μm in diameter, with a polyploid nucleus. Also referred to as megacaryocyte, megalokaryocyte, and thromboblast.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a large bone marrow cell; regarded as the source of blood platelets
From mega- + karyocyte (Wiktionary)