Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
bācātus, a, um, Part. of a verb not otherwise in use, bāco, āre [baca, II. B. 1.], set or adorned with pearls, pearl- (very rare): monile, * Verg. A. 1, 655; Sil. 8, 134; Lampr. Alex. Sev. 41.