Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ŭlŭla, ae, f. (sc. avis) [kindr. with Sanscr. ulūka; old Germ. uwila, ūla; new Germ. Eule; Engl. owl; cf. Gr. ὀλολύζω], a screechowl whose cry was of ill omen, Varr. L. L. 5, 11, § 75 Müll.; Plin. 10, 12, 16, § 34; cf. id. 30, 13, 39, § 118; Verg. E. 8, 55.
Prov.: homines eum pejus formidant quam fullo ululam, Varr. Sat. Men. 86, 4.