prothrombin
C2CEFR level
88/100Rarity: very rare
TechnicalRegister
The circulating zymogen, also called factor II, that is cleaved to thrombin during coagulation.
Warfarin prolongs the prothrombin time by impairing synthesis of vitamin-K-dependent factors.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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