The Collaborative International Dictionary of English v.0.48:

Ceiba \Ceiba\ n.
   a genus of tropical American trees with palmately compound
   leaves and showy bell-like flowers.

   Syn: genus Ceiba.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Ceiba
    n 1: tropical American trees with palmately compound leaves and
         showy bell-shaped flowers [syn: Ceiba, genus Ceiba]