Oxide

(oks'id.) [FromGr. oxys, acid, and eidos, shape. ] (Chem.) The combination of a simple or compound element with oxygen, in smaller quantity than is required to produce acidity. To designate O. having progre ively increasing quantities of oxygen, the first syllables of the Greek numerals are prefixed: thus, prot oxide, deutoxide, tritoxide, . And hyper, or per, is used with the oxide containing it in the largest quantity, as peroxide of iron. When the combination is equivalent to an atom of the base united with an atom and a half of oxygen, it is a sesqui-oxide. [s. 675]