plasma thromboplastin antecedent
noun
plasma thromboplastin an·te·ced·ent
-ˌant-ə-ˈsēd-ᵊnt 
: a clotting factor whose absence is associated with a form of hemophilia
—abbreviation PTA
called also factor XI
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“Plasma thromboplastin antecedent.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/plasma%20thromboplastin%20antecedent. Accessed 19 Apr. 2024.
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