Bali str aria

bal-is-trār′i-a, n. an aperture or loophole in the wall of a fortification through which cro bowmen might discharge their bolts.— n. Bal′ister ( obs. ), name for an arbalester or cro bowman, also an arbalest or cro bow itself. [Low L. ballistrarius , balistra , a variant form of ballista , a cro bow.]