WordNet (r) 3.0 (2006):

ceiba tree
    n 1: massive tropical tree with deep ridges on its massive trunk
         and bearing large pods of seeds covered with silky floss;
         source of the silky kapok fiber [syn: kapok, ceiba
         tree, silk-cotton tree, white silk-cotton tree,
         Bombay ceiba, God tree, Ceiba pentandra]