The Collaborative International Dictionary of English v.0.48:
Oxygenation \Ox`y*gen*a"tion\, n. [Cf. F. oxyg['e]nation.] (Chem.) The act or process of combining or of treating with oxygen; oxidation. [1913 Webster]WordNet (r) 3.0 (2006):
oxygenation n 1: the process of providing or combining or treating with oxygen; "the oxygenation of the blood"