suffusion

[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.

2. That with which a thing is suffused.

3. (Zoöl.) A blending of one color into another; the spreading of one color over another, as on the feathers of birds.

1. The act of pouring a fluid over the body.
2. The condition of being wet with a fluid.
3. A spreading out of a body fluid from a vessel into the surrounding tissues.
4. The reddening of a surface.

The noun has one meaning:

Meaning #1: the process of permeating or infusing
  Synonyms: permeation, pervasion, impregnation, saturation