Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dŭŏdĕcĭes (or -ĭens, quadrisyl., Auct. Carm. de Phoenice, 28), adv. num. [duodecim], twelve times, Cic. Verr. 2, 2, 75; Liv. 38, 28.