Spetum

thumb|right|Italian folding spetum, c. 1550 thumb|right|Detail of folding spetum showing hinge and side blades

A spetum is a polearm that was used in Europe during the 13th century. Other names include chauve souris, corseca, corsèsque, korseke, runka, and rawcon. It consists of a pole, some long, on which is mounted a spear head with two projections at its base.