Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† 1. canthus, i, m., = κάνθος; lit. the iron ring around a carriage-wheel, the tire, Quint. 1, 5, 88, where it is considered as barbarian (African or Spanish).
Hence,
2. Canthus, i, m., = Κάνθος, nom. propr., name of an Argonaut, Hyg. Fab. 14; Val. Fl. 1, 3 and 6.