Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. gillo, ōnis, m., a cooling-vessel, cooler for liquids, Poët. in Anthol. Lat. 2, p. 369 and 406 Burm.; cf. βαυκάλιον gillo, Gloss. Philox.
2. Gillo, ōnis, m., the name of a legacyhunter, Juv. 1, 40.