Basic Guidelines For English Spellings
1Twice; two-; double.
- 1.1Chemistry Containing two atoms, molecules, or groups of a specified kind.
From Greek dis ‘twice’.
variant spelling of dis- shortened before l, m, n, r, s (followed by a consonant), and v; also often shortened before g, and sometimes before j
variant spelling of dia- shortened before a vowel (as in dielectric)
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