- Chemical compound - Laughing gas, nitrous ... - Oxygen compound - Rust will make beast die, perhaps - A binary compound of oxygen with an atom or radical, or a
compound which is regarded as binary; as, iron oxide, ethyl oxide,
nitrogen oxide, etc.
- A prefix, also used adjectively - A compound containing oxygen. - A compound containing the hydroxyl group, more properly
designated by hydroxy-. See Hydroxy-.