Fibrin/ˈfaɪbrɪn/ Definition 1 of 1Pro Tip 1/3Medical Context Fibrin is mostly used in medical or scientific discussions about blood clotting. The surgeon explained how fibrin helps in wound healing. Pro Tip 2/3Not a Fabric Don't confuse fibrin with fabric or fiber; it's a specific blood protein. Unlike dietary fiber, fibrin is not something we eat for health. Pro Tip 3/3Literal Use Fibrin is a technical term, so it's not used metaphorically or in slang. The textbook described the exact structure of fibrin.