The Collaborative International Dictionary of English v.0.48:

Khaya \Kha"ya\, n. (Bot.)
   A lofty West African tree (Khaya Senegalensis), related to
   the mahogany, which it resembles in the quality of the wood.
   The bark is used as a febrifuge.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Khaya
    n 1: African mahogany trees [syn: Khaya, genus Khaya]