- Combination with oxygen.
- Increasing the valence of an atom or ion by the loss from it of hydrogen or of one or more electrons thus rendering it more electropositive, as when iron is changed from the ferrous (2+) to the ferric (3+) state.
- In bacteriology, the aerobic dissimilation of substrates with the production of energy and water; in contrast to fermentation, the transfer of electrons in the oxidation process is accomplished through the respiratory chain, which uses oxygen as the final electron acceptor.
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Examples: glitazone, GI cocktail, etc.