[per.fuse] vt per.fused ; per.fus.ing [ME, fr. L perfusus, pp. of perfundere to pour over, fr. per- through + fundere to pour--more at found] (15c) 1: suffuse
2. a: to cause to flow or spread: diffuse b: to force a fluid through (an organ or tissue) esp. by way of the blood vessels -- per.fu.sion n