Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nāvĭcella (naucella), ae, f. dim. [navis], a small vessel, a boat, skiff (postclass.): navicellae, quae piscium capiendorum causā paratae sunt, Dig. 33, 7, 17, § 1 (al. naucellae).