The Collaborative International Dictionary of English v.0.48:

obechi \obechi\ n.
   A large Western African tree (Triplochiton scleroxcylon)
   having large palmately lobed leaves and axillary cymose
   panicles of small white flowers and one-winged seeds; it
   yields soft white to pale yellow wood.

   Syn: obeche, arere, samba, Triplochiton scleroxcylon.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

obechi
    n 1: large west African tree having large palmately lobed leaves
         and axillary cymose panicles of small white flowers and
         one-winged seeds; yields soft white to pale yellow wood
         [syn: obeche, obechi, arere, samba, Triplochiton
         scleroxcylon]