WordReference Random House Unabridged Dictionary of American English © 2026
Christ′mas fac′tor, [Biochem.]
  1. Biochemistrya blood constituent necessary for clotting, the absence of which is characterized by a hemophilialike condition. Also called factor IX, plasma thromboplastic component. 
  • see Christmas disease

'Christmas factor' also found in these entries (note: many are not synonyms or translations):
factor IX - plasma thromboplastic component

Forum discussions with the word(s) "Christmas factor" in the title:


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