Definition of "buisine"

It was marvellously great, and shewed such joy and satisfaction that the sound and bruit of their instruments, horns, buisines, and trumpets, were heard even as far as the castle.

1823, Archaeologia; Or, Miscellaneous Tracts Relating to Antiquity, page 155

The clarion named in the above passages appears to have been a smaller kind of trumpet. The buisine (from buccina) was also a sort of trumpet: it was of a bent form, and made of brass.

1860, John Hewitt, The fourteenth century, page 310