Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† scyphus, i, m., = σκύφος, a cup, goblet (cf.: calix, poculum), Plaut. As. 2, 4, 38; Varr. ap. Gell. 3, 14, 3; Cic. Verr. 2, 4, 14, § 32; Tib. 1, 10, 8; Verg. A. 8, 278; Hor. C. 1, 27, 1; id. Epod. 9, 33 al.; Plin. 34, 14, 40, § 141; 34, 17, 48, § 163: illuseras heri inter scyphos, i. e. while drinking, over our wine, Cic. Fam. 7, 22 init.: candelabri scyphi, Vulg. Exod. 37, 17.