Pro tem

Pro tempore (/ˌproʊ ˈtɛmpəri/, /ˌproʊ ˈtɛmpərɛ/ or /ˌproʊ ˈtɛmpəreɪ/), 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 United States Senate, who acts in place of the President of the United States Senate, the Vice President of the United States.