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Definition of Singlet oxygen
1. Noun. (physics chemistry) A metastable state of molecular oxygen that has a slightly higher energy than normal triplet oxygen, and is more chemically reactive. ¹
¹ Source: wiktionary.com
Medical Definition of Singlet oxygen
1. An energised but uncharged form of oxygen that is produced in the metabolic burst of leucocytes and that can be toxic to cells. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)