Liberal Dictionary English Dictionary
< /ˌbæl əˈstrɛər iˌi/.
- (in a medieval fortification) an opening, usually in the form of a cross, through which a crossbow could be fired.
Balistraria | ClipArt ETC
Llanblethian castle (Balistraria) – Architecture Photos – Philip ‘s
File:Chambers 1908 Balistraria.png – Wikimedia Commons