prothrombin | 
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| 1. | [ noun ] (chemistry,biochemistry) a protein in blood plasma that is the inactive precursor of thrombin | |
| Synonyms: | factor_ii | |
| Related terms: | protein coagulation_factor blood_serum | |
| Similar spelling: | 
  prothrombinase pretermit protropin prodromic preterm_infant protruding protirelin pretermission preterm_baby prodrome prodroma pretorium  | 
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