di- — two, double (affix)

di- two, double

Component prefix

Greek · Greek 'two', common in chemistry (dioxide, dilemma).

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Used in (3)

/dɑeˈlemə/ A difficult situation in which you must choose between two options that both seem bad. M S

/daɪˈɑksaɪd/ A chemical compound that has two oxygen atoms in each molecule. M S

/daɪˈkɑtəmi/ The division of a class into two disjoint subclasses that are together comprehensive, as the division of human into female and male. M S