Hyperaemia

‖n. [ NL., fr. Gr. "ype`r over + a"i^ma blood. ] (Med.) A superabundance or congestion of blood in an organ or part of the body. [ 1913 Webster ]

Active hyperæmia, congestion due to increased flow of blood to a part. --
Passive hyperæmia, interchange due to obstruction in the return of blood from a part.

-- Hy`per*æ"mic a. [1913 Webster]