Definition of di- in English:


Pronunciation: /dʌɪ, di/

combining form

  • 1Twice; two-; double: dichromatic
  • 1.1 Chemistry Containing two atoms, molecules, or groups of a specified kind: dioxide


from Greek dis 'twice'.

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Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space