Meanings
nounfactor IX (uncountable)
Synonyms & antonyms
nounSynonym of Christmas factor.
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More synonyms by meaning
nouncoagulation factor whose absence is associated with hemophilia B
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Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
APA
factor IX. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/factor%20IX
MLA
“factor IX.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/factor%20IX. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “factor IX,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/factor%20IX.
Source: factor IX on Wiktionary, CC BY-SA 4.0.