Source : Webster's Revised Unabridged Dictionary (1913)

Suffusion \Suf*fu"sion\, n. [L. suffusio: cf. F. suffusion.]
   1. The act or process of suffusing, or state of being
      suffused; an overspreading.

            To those that have the jaundice, or like suffusion
            of eyes, objects appear of that color. --Ray.

   2. That with which a thing is suffused.

   3. (Zo["o]l.) A blending of one color into another; the
      spreading of one color over another, as on the feathers of
      birds.

Source : WordNet®

suffusion
     n : the process of permeating or infusing something with a
         substance [syn: {permeation}, {pervasion}]