NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,360 terms related to cancer and medicine.

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oxidation-reduction
(OK-sih-DAY-shun-ree-DUK-shun)
A chemical reaction that takes place between an oxidizing substance and a reducing substance. The oxidizing substance loses electrons in the reaction, and the reducing substance gains electrons. For example, rust forms when there is an oxidation-reduction reaction between oxygen contained in water or moist air (an oxidizing substance) and iron (a reducing substance). Oxidation-reduction reactions also occur when glucose (a type of sugar) and fat are broken down in the body to make energy. Also called redox.