Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
corbŭla, ae, f. dim. [corbis], a little basket, Cato, R. R. 11, 5; Varr. R. R. 1, 15; id. L. L. 5, § 139; Col. 12, 50, 8; Plaut. Aul. 2, 7, 4; Caecil. ap. Non. p. 197, 29; Suet. Ner. 19 al.