Di- (?). [Gr. 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.
© Webster 1913.
Di"a- (?), Di-. [Gr. through; orig., dividing into two parts; akin to two. See Two, and cf. 1st Di-.]
A prefix denoting through; also, between, apart, asunder, across. Before a vowel dia- becomes di-; as, diactinic; dielectric, etc.
© Webster 1913.