Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
‡ aurĕa, ae, f. [auris], the bridle of a horse: aureas dicebant frenos, quibus equorum aures religantur, Paul. ex Fest. p. 27 Müll.; cf. id. ib. s. v. aureax, p. 8.