Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quā̆drangŭlātus, a, um, adj. [quadrangulus], quadrangular (eccl. Lat.): quadrangulata turris, Tert. Anim. 17: ligna, Vulg. 3 Reg. 7, 5.