megakaryocyte

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megakaryocyte

 [meg″ah-kar´e-o-sīt″]
the giant cell of bone marrow; it is a large cell with a greatly lobulated nucleus, and is generally supposed to give rise to blood platelets.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

meg·a·kar·y·o·cyte

(meg'ă-kar'ē-ō-sīt),
A large cell (as much as 100 mcm in diameter) with a polyploid nucleus that is usually multilobed; megakaryocytes are normally present in bone marrow, not in the circulating blood, and give rise to blood platelets.
[mega- + G. karyon, nut (nucleus), + kytos, hollow vessel (cell)]
Farlex Partner Medical Dictionary © Farlex 2012

megakaryocyte

(mĕg′ə-kăr′ē-ō-sīt′, -ə-sīt′)
n.
A large bone marrow cell with a lobulate nucleus that gives rise to blood platelets.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

megakaryocyte

A very large cell native to the bone marrow which is the precursor of platelets and the largest (40–100 µm in diameter) normal nucleated haematopoietic cell in the marrow. Megakaryocytes may be relatively small (micromegakaryocytes) and measure 15–30 µm in diameter. The nucleus usually has multiple (8, 16 or 32) overlapping lobes; megakaryocytes with few (2 or 4) lobes may occur in myelodysplasia. Nucleoli are absent, chromatin is coarse, cytoplasm is abundant, stains light blue or pink, and contains numerous purplish-red or pink granules. The N:C ratio is 1:1 to 1:2. Megakaryocytes producing platelets may reveal demarcated granular clumps of platelets extruding/streaming from the margins (platelet budding).
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

meg·a·kar·y·o·cyte

(meg'ă-kar'ē-ō-sīt)
A large cell with a multilobed nucleus; normally present in bone marrow, not in the circulating blood; gives rise to blood platelets (thrombocytes).
Synonym(s): megalokaryocyte.
[mega- + G. karyon, nut (nucleus), + kytos, hollow vessel (cell)]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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MEGAKARYOCYTE: (Orig. mag. ×640)
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MEGAKARYOCYTE

megakaryocyte

(meg?a-kar'e-o-sit?) [? + karyon, nucleus, + kytos, cell]
Large bone marrow cell with large or multiple nuclei from which platelets are derived.
See: platelet; illustrationillustration
Medical Dictionary, © 2009 Farlex and Partners

megakaryocyte

An unusually large bone marrow cell that releases many small fragments of its CYTOPLASM as the blood PLATELETS essential for clotting (blood coagulation).
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Megakaryocyte

A large bone marrow cell with a lobed nucleus that is the precursor cell of blood platelets.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.