Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pĭcĕa, ae, f. [pix], the pitch-pine: Pinus silvestris, Linn.; Verg. G. 2, 257; Ov. M. 10, 101; id. H. 12, 67; Plin. 16, 10, 18, § 40 sqq.; 16, 24, 38, § 90.