Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nŏvēnus, a, um, num. adj. distr. [novem], nine each, nine: ut virgines ter novenae per urbem euntes carmen canerent, Liv. 27, 37: terga novena boūm, Ov. M. 12, 97: novenorum conceptu dierum, Plin. 3, 5, 9, § 53; in sing., Stat. S. 1, 2, 4.