Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ollŭla, ae, f. dim. [olla], a little pot (anteand post-class.), Varr. R. R. 1, 54, 2; App. M. 2, p. 117, 41: sub ollulā cinis, Arn. 5, 18.