TRIOXIDE

trioxide

(noun) an oxide containing three atoms of oxygen in the molecule

Source: WordNet® 3.1

Etymology

Noun

trioxide (plural trioxides)

(chemistry) any oxide containing three oxygen atoms in each molecule

(chemistry) any organic compound of general formula R-OOO-R', derived from trioxidane

Source: Wiktionary

Tri*ox"ide, n. Etym: [Pref. tri- + oxide.] (Chem.)

Definition: An oxide containing three atoms of oxygen; as, sulphur trioxide, SO3; -- formerly called tritoxide.

Source: Webster’s Unabridged Dictionary 1913 Edition