1. In the clotting of blood thrombin catalyses factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot
   - factor XIII

Type of: clotting factor, coagulation factor

• aversive conditioning
• aversive stimulus
• avert
• avertable
• avertible
• averting
• Aves
• Avesta
• Avestan
• avian
• avian influenza
• avianise
• avianize
• aviary
• aviate
• aviation
• aviation medicine
• aviator
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• aviatrix
• Avicenna
• Avicennia
• Avicennia marina
• Avicennia officinalis
• Avicenniaceae