hypoxaemiaPronunciation: /ˌhʌɪpɒkˈsiːmɪə/ (US hypoxemia)Definition of hypoxaemia noun [mass noun] Medicine an abnormally low concentration of oxygen in the blood. Ecology oxygen deficiency in a biotic environment. Origin: late 19th century: from hypo- (denoting an element in a low valency) + oxygen + -aemiahypoxaemia in other Oxford dictionaries Definition of hypoxaemia in the US English dictionary