Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sucerda, ae, f. [sus and root skar-; Gr. σκώρ; cf. stercus], the dung of swine, Lucil. ap. Non. 175, 14; Titin. ap. Fest. p. 302 Müll. (Com. Rel. v. 178 Rib.; cf. excerno, 2).