DICT.TW Dictionary Taiwan

 ex of·fi·cio /ˌɛksəˈfɪʃiˌo, si-/

 Ex of·fi·ci·o pl. Ex officiis   From office; by virtue, or as a consequence, of an office; officially.
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 ex officio
      adj : by virtue of an office or position; "the head of the
            department serves as an ex officio member of the board"
      adv : by virtue of position; "the president sat on the committee
            ex officio" [syn: by right of office]