Q / quādrātūra
noun

quādrātūra

gen. quā^drātūrae · gender feminine · decl. 1st
A making square; squaring; quadrature
A making square, squaring, quadrature (postclass.): circuli quadratura, the squaring or quadrature of the circle, App. Dogm. Plat. 3, p. 37, 11.—
a square by extension
Transf., a square: vitreae, Vop. Firm. 3.