Sēs'qui-ox'ide, n.
n. [Prefix sesqui and oxide.] (Chem.) A compound of oxygen with some other element, in the proportions of three equivalents of the oxygen to two of the other element.
n. [Prefix sesqui and oxide.] (Chem.) A compound of oxygen with some other element, in the proportions of three equivalents of the oxygen to two of the other element.