The Collaborative International Dictionary
Tetroxide \Tet*rox"ide\, n. [Tetra- + oxide.] (Chem.) An oxide having four atoms of oxygen in the molecule; a quadroxide; as, osmium tetroxide, OsO4.
Wiktionary
n. (context chemistry English) any oxide containing four oxygen atoms in each molecule
WordNet
Wikipedia
Usage examples of "tetroxide".
When powdered or else heated in air, it gives off osmium tetroxide, which is not only toxic but unendurably smelly as well.
The sky was lit at uneven intervals by waste-gas fires, and the air was foul with the stink of petroleum distillates: aviation kerosene, gasoline, diesel fuel, benzine, nitrogen tetroxide for intercontinental missiles, lubricating oils of various grades, and complex petrochemicals identified only by their alphanumeric prefixes.
Red-fuming nitric acid, nitrogen tetroxide, hydrazine, that sort of thing.
This was not the forty-G unit that was supplied with fuel by transmitters from a supply dump, but a one-G maneuvering rocket with three big fuel tanks, one for hydrazine and two for nitrogen tetroxide.