di-

Di-. Etym: [Gr. bis twice. See Two, and cf. Bi-, Dia-. The L. pref. dis- sometimes assumes the form di-. See Dis-.] Defn: A prefix, signifying twofold, double, twice; (Chem.) Defn: denoting two atoms, radicals, groups, or equivalents, as the case may be. See Bi-, 2. Di"a-, Di-. Etym: [Gr. Two, and cf. 1st Di-.] Defn: A prefix denoting through; also, between, apart, asunder, across. Before a vowel dia- becomes di-; as, diactinic; dielectric, etc.

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