\Hy`per*[ae]"mi*a\, 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.
{Active hyper[ae]mia}, congestion due to increased flow of
   blood to a part.
{Passive hyper[ae]mia}, interchange due to obstruction in the
   return of blood from a part. -- {Hy`per*[ae]"mic}, a.