Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nōnārĭus, a, um, adj. [nonus], of or belonging to the ninth hour.
As subst.: nonaria, ae, f. (sc. meretrix), a public prostitute (so called because not allowed to show herself before the ninth hour of the day), Pers. 1, 133.