• (n.) The act of pouring into a vessel; specif. (Med.), the operation of introducing a substance into a blood vessel; as, intrafusion of blood.
In`tra·fu'sion noun [ Prefix intra- + Latin fundere , fusum , to pour.] The act of pouring into a vessel; specif. (Medicine) , the operation of introducing a substance into a blood vessel; as, intrafusion of blood.