Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hellŭor (hēluor), ātus, 1, v. dep. n. and a. [helluo], to gormandize, devour (Ciceron.; cf.: decoquo, abligurio): cum Graecis jam in exostra helluabatur, Cic. Prov. Cons. 6, 14; id. Sest. 52, 111: quasi helluari libris, si hoc verbo in tam clara re utendum est, id. Fin. 3, 2, 7: ille gurges helluatus tecum simul rei publicae sanguine, id. Dom. 47, 124.
Note: Helluatus as pass., Verg. Cat. 5, 11.