president pro tempore


president pro tem·po·re

P0540300 (tĕm′pə-rē)n. pl. presidents pro tempore The senator who presides over the US Senate in the absence of the vice president.

pres′ident pro tem′pore


n. a senator, usu. a senior member of the majority party, who is chosen to preside over the Senate in the absence of the vice president. Also called pres′ident pro tem′.