noun, plural in·ter·re·ges [in-ter-ree-jeez] /ˌɪn tərˈri dʒiz/.
Examples from the Web for interrex
The interrex who presided over the comitia proclaimed, without opposition, Crassus and Pompey consuls.History of Julius Caesar Vol. 2 of 2|Napoleon III, Emperor of the French, 1808-1873.
The patricians, now that the republic was without any curule magistrate, assembled together and elected an interrex.The History of Rome, Books 01 to 08|Titus Livius
Interrex, in′tėr-reks, n. one who rules during an interregnum: a regent.
Finally, the people elected to every magistracy with the exception of the occasional offices of Dictator and Interrex.