Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quā̆dringenti, ae, a, adj. [quattuorcentum], four hundred: anni, Cic. Rep. 1, 37, 58; so id. Pis. 5, 10: talis quadringentis jactis, id. Div. 2, 21, 48: (sestertia), Juv. 1, 105; Vitr. 10, 9, 4: pantheres, Plin. 8, 17, 24, § 64.