Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
būcētum (būcīta, ōrum, n., Varr. L. L. 5, § 164 Müll.), i, n. [bos], a pasture for cattle, cow-pasture (very rare), Luc. 9, 185; Gell. 11, 1, 1; Sid. Ep. 2, 2.