Di-

Di- Di- [Gr. di`s- twice; akin to ? two, L. bis twice. See {Two}, and cf. {Bi-}, {Dia-}. The L. pref. dis- sometimes assumes the form di-. See {Dis-}.] A prefix, signifying twofold, double, twice; (Chem.) denoting two atoms, radicals, groups, or equivalents, as the case may be. See {Bi-}, 2.