Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
villŭla, ae, f. dim. [villa], a little country-house, a small villa, Cic. Att. 8, 9, 3; Hor. S. 1, 5, 45; 2, 3, 10; App. M. 10, p. 240, 9.