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factor ix

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Christmas factor

–noun Biochemistry.
a blood constituent necessary for clotting, the absence of which is characterized by a hemophilialike condition.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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factor IX  
n.  A protein substance in blood plasma that participates in and is essential for the blood-clotting process. A deficiency of this factor is the cause of Christmas disease.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: Christmas factor
Function: noun
: FACTOR IX

Main Entry: factor IX
Pronunciation: -'nIn
Function: noun
: a clotting factor whose absence is associated with Christmas disease called alsoautoprothrombin II, Christmas factor
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

Christmas factor n.
See factor IX.

factor IX n.
A factor in the clotting of blood necessary for the formation of intrinsic blood thromboplastin; a deficiency of it causes hemophilia B. Also called antihemophilic globulin B, Christmas factor.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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