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. Zool.
A blending of one color into another; the spreading of one color over another, as on the feathers of birds.
© Webster 1913.