Webster’s Revised Unabridged Dictionary · 1913
Trioxide
Tri·ox′ide, n. [Pref. tri- + oxide.] (Chem.) An oxide containing three atoms of oxygen; as, sulphur trioxide, SO3; — formerly called tritoxide.
Webster’s Revised Unabridged Dictionary · 1913
Tri·ox′ide, n. [Pref. tri- + oxide.] (Chem.) An oxide containing three atoms of oxygen; as, sulphur trioxide, SO3; — formerly called tritoxide.