Hȳ'per1
[Gr. ὑπέρ, allied to Lat. super, Skr. upari, Ger. über, Eng. over.] A prefix used in composition to denote excess, or something over or beyond;—sometimes used in the composition of chemical terms, instead of super, to denote excess, or that the substance first mentioned in the name of the compound enters in a greater proportion than the other; as, hyper-oxide, one containing an excess of oxygen.