hyperaemiaPronunciation: /ˌhʌɪpərˈiːmɪə/ (US hyperemia)Definition of hyperaemia noun [mass noun] Medicine an excess of blood in the vessels supplying an organ or other part of the body. Derivatives hyperaemic adjective Origin: mid 19th century: from hyper- 'above normal' + -aemiahyperaemia in other Oxford dictionaries Definition of hyperaemia in the US English dictionary