WordNet (r) 3.0 (2006):

neem
    n 1: large semi-evergreen tree of the East Indies; trunk exudes
         a tenacious gum; bitter bark used as a tonic; seeds yield
         an aromatic oil; sometimes placed in genus Melia [syn:
         neem, neem tree, nim tree, margosa, arishth,
         Azadirachta indica, Melia Azadirachta]