ˈheləˌpōlz noun
also he·lep·o·lis hə̇ˈlepələ̇s
( plural helepoles ˈheləˌpōlz ; also helepolises hə̇ˈlepələ̇sə̇z)
Etymology: French & Latin; French hélépole, from Latin helepolis, from Greek helepolis, from helein to take + polis city — more at sell , police
: an ancient siege engine composed of a movable tower covering a battering ram