factor XI

(redirected from Coagulation factor XIa)
Also found in: Dictionary, Thesaurus, Medical.
Related to Coagulation factor XIa: Factor ixa

factor XI

[′fak·tər ə′le·vən]
(biochemistry)
A procoagulant present in normal blood but deficient in hemophiliacs. Also known as plasma thromboplastin antecedent (PTA).