Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pōcillātor, ōris, m. [pocillum], a cupbearer (post-class.): quo, Jovi pocillatorem Phrygium sustulerat, i. e. Ganymede, App. M. 6, p. 179, 16; so id. ib. 10, p. 247.