balistraria
noun
bal·is·trar·ia
ˌbaləˈstra(a)rēə
plural balistrariae
-rēˌē
: a narrow often cruciform opening in a wall (such as a tower or fortress) for discharging arrows (as from a crossbow)
Word History
Etymology
New Latin, from Late Latin, feminine of balistrarius, ballistrarius of slinging, from Latin balista, ballista sling