The Collaborative International Dictionary of English v.0.48:

Becuiba \Be*cui"ba\, n., Becuiba nut \Be*cui"ba nut`\ [Native
   name.] (Bot.)
   The nut of the Brazilian tree Myristica Bicuhyba, which
   yields a medicinal balsam used for rheumatism.
   [Webster 1913 Suppl.]