Definition of di- in English:

di-

Syllabification: di-

combining form

1.1 Chemistry Containing two atoms, molecules, or groups of a specified kind: dioxide

Origin

from Greek dis 'twice'.

Definition of di- in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
adjective
(of a person or their actions) criminal; villainous