balistraria

[bal-uh-strair-ee-uh]
noun, plural bal·is·tra·ri·ae [bal-uh-strair-ee-ee] /ˌbæl əˈstrɛər iˌi/.
  1. (in a medieval fortification) an opening, usually in the form of a cross, through which a crossbow could be fired.

Origin of balistraria

1835–45; < Medieval Latin, feminine of Late Latin bal(l)istrārius, Latin ballistārius pertaining to a ballista (in ML a crossbow), equivalent to ballist(a) + -ārius -ary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018