Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ŏvālis, e, adj. [ovo], of or belonging to an ovation (post-class.): ovalis corona murtea est: eā utebantur imperatores qui ovantes urbem introibant, Gell. 5, 6, 20; cf. Fest. p. 195 Müll.