1. An enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
   - thromboplastin, thrombokinase

Type of: clotting factor, coagulation factor

• uncase
• uncastrated
• uncategorised
• uncategorized
• uncaulked
• uncaused
• unceasing
• unceasingly
• uncensored
• unceremonial
• unceremonious
• unceremoniously
• unceremoniousness
• uncertain
• uncertainly
• uncertainness
• uncertainty
• uncertainty principle
• uncertified
• unchain
• unchained
• unchallengeable
• unchallenged
• unchangeability
• unchangeable