Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Sparti and Spartoe (dissyl.), ōrum, m., = Σπάρτοι (the Sown, from σπείρω), the armed men who sprang up from the dragon’s teeth sown by Cadmus, Hyg. Fab. 178; Amm. 19, 8, 11; Varr. ap. Gell. 17, 3, 4; Lact. 3, 4, 9.