thromboplastin

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thromboplastin

 [throm″bo-plas´tin]
tissue thromboplastin factor III, a coagulation factor derived from several different sources in the body, such as brain and lung; it is important in the formation of extrinsic prothrombin converting principle in the extrinsic pathway of coagulation. Called also tissue factor. See also activated partial thromboplastin time.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

throm·bo·plas·tin

(throm'bō-plas'tin),
A substance present in tissues, platelets, and leukocytes necessary for the coagulation of blood; in the presence of calcium ions thromboplastin is necessary for the conversion of prothrombin to thrombin, an important step in coagulation of blood. It is now generally believed that thromboplastin activity may be developed through blood (intrinsic) or tissue (extrinsic) systems. Tissue thromboplastin (factor III) interacts with factor VII and calcium to activate factor X; active factor X combines with factor V in the presence of calcium and phospholipid to produce thromboplastin activity (also commonly called thromboplastin).
Farlex Partner Medical Dictionary © Farlex 2012

thromboplastin

(thrŏm′bō-plăs′tĭn)
n.
A protease that converts prothrombin to thrombin in the early stages of blood clotting. Also called thrombokinase.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

throm·bo·plas·tin

(throm'bō-plas'tin)
A substance present in tissues, platelets, and leukocytes necessary for the coagulation of blood; in the presence of calcium ions, thromboplastin is necessary for the conversion of prothrombin to thrombin, an important step in blood coagulation.
Synonym(s): platelet tissue factor, thrombokinase.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

thromboplastin

Blood clotting factor III, an obsolete term referring to what is now known to be several blood clotting factors operating together.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

thromboplastin

see BLOOD CLOTTING.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Thromboplastin

A protein in blood that converts prothrombin to thrombin.
Mentioned in: Prothrombin Time
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

throm·bo·plas·tin

(throm'bō-plas'tin)
A substance present in tissues, platelets, and leukocytes necessary for the coagulation of blood.
Synonym(s): platelet tissue factor, thrombokinase.
Medical Dictionary for the Dental Professions © Farlex 2012