Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
aucella (aucilla), ae, f. dim. [as if for avicella, from avis], a little bird (only postclass.; Varro, L. L. 8, § 79 Müll., said expressly that this form was not in use, but avicella), App. M. p. 656 Oud., and Apic. 4, 5; 5, 3; 8, 7.