Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
bellārĭa, ōrum, n., that which is used as a dessert, fruit, nuts, confectionery, sweet wine, etc.; the dessert, τράγημα, Fr. dragée [from bellus, like bellissimum, Ter. Ad. 4, 2, 51 Don., and pulchralia, Fest. p. 210], Gell. 13, 11, 7; Plaut. Truc. 2, 5, 27; Suet. Ner. 27.
Note: Here the corrupted passage ap. Paul. ex Fest. p. 35 Müll. seems to belong: bellarium et bellaria res aptas bellis (epulis? acc. to Scal., or belle? Cod. Ber. and Lips. have belli) appellabant.