Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quā̆drātūra, ae, f. [quadro]. 
- I.  A making square, squaring, quadrature (postclass.): circuli quadratura, the squaring or quadrature of the circle, App. Dogm. Plat. 3, p. 37, 11.
- II.  Transf., a square: vitreae, Vop. Firm. 3.