Oxo


 * In chemistry:
 * oxo, the formal IUPAC nomenclature for a ketone functional group. However, other prefixes are also used by various books and journals. For some common chemicals (mainly in biochemistry), keto or oxy is the term used to describe the ketone (also known as alkanone) functional group.  Oxo also refers to a single oxygen atom coordinated to a transition metal (a metal oxo).