The Collaborative International Dictionary of English v.0.48:
oxidise \oxidise\, oxidised \oxidised\v. t. & i. (Chem.) Same as oxidize and oxidized. [Chiefly Brit.] [WordNet 1.5]WordNet (r) 3.0 (2006):
oxidised adj 1: combined with or having undergone a chemical reaction with oxygen; "the oxidized form of iodine" [syn: oxidized, oxidised]