suffusion

noun
suf·​fu·​sion | \ sə-ˈfyü-zhən How to pronounce suffusion (audio) \

Medical Definition of suffusion

1 : the act or process of suffusing or state of being suffused with something specifically : the spreading of a fluid of the body into the surrounding tissues a suffusion of blood
2 : a coloring spread over a surface (as the face)

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