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Pro tempore, abbreviated pro tem or p.t., is a Latin phrase which best translates to 'for the time being' in English. This phrase is often used to describe a person who acts as a locum tenens ('placeholder') in the absence of a superior, such as the president pro tempore of the U.S. Senate, who acts in place of the president of the United States Senate—a position that is held ex officio by the cur... Wikipedia