Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sīcīlis, is, f. [sica], a cutting instrument, sickle (cf. falx): incedit veles vulgo sicilibus latis, Enn. ap. Paul. ex Fest. p. 337 Müll. (Ann. v. 499 Vahl.): sicilis similitudo, Plin. 6, 13, 15, § 38.