Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quā̆dringēnārĭus, a, um, adj. [quadringeni], of four hundred each (class.): cohortes, each consisting of four hundred men, Cic. Att. 6, 1, 14: quadringenariae cohortes (al. quadringentariae), Liv. 7, 7, 4: IVDEX, who possessed an equestrian fortune of four hundred thousand sesterces, Inscr. Murat. 1048, 4; Inscr. Grut. 431, 7.