A / ăpertūra
noun

ăpertūra

gen. ăpertūrae · gender feminine · decl. 1st
aperio (only post Aug.).
An opening
An opening (abstr.), Vitr. 4, 6 fin.; Dig. 28, 5, 3.—
An opening; aperture; a hole
An opening (concr.), aperture, a hole, Vitr. 5, 5; so id. 10, 9: Vulg. Amos, 4, 3; 9, 11.