Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
centiens or centies, adv. [centum], a hundred times: eadem imperare, Plaut. As. 2, 4, 16: dictum, Ter. Heaut. 5, 1, 8: sestertium centiens et octogiens (sc. milia), Cic. Pis. 35, 86: circiter centies sestertium, Nep. Att. 5, 2.