prothrombin time
noun
: the time required for a particular specimen of prothrombin to induce blood-plasma clotting under standardized conditions in comparison with a time of between 11.5 and 12 seconds for normal human blood
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“Prothrombin time.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/prothrombin%20time. Accessed 31 Oct. 2025.
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