factor-ix

Christmas factor

noun Biochemistry.
a blood constituent necessary for clotting, the absence of which is characterized by a hemophilialike condition.
Also called factor IX, plasma thromboplastic component.


Origin:
see Christmas disease

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factor IX

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American Heritage
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
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