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An oxidoreductase that catalyzes the incorporation of molecular oxygen into its substrate.
(Biochemistry) biochem an enzyme that catalyses biochemical reactions by means of oxygen
ox•y•gen•ase(ˈɒk sɪ dʒəˌneɪs, -ˌneɪz)
an oxidoreductase enzyme that catalyzes the introduction of molecular oxygen into an organic substance.