Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
altĭlĭārius, ii, m. [altilis], one that fattens birds, esp. fowls, Inscr. Orell. 2866: Inser. Murat. 906, 9; cf. altiliarius: ὀρνιθοτρόφος, Gloss. Philox.