Azadirachta indica

from WordNet (r) 3.0 (2006)

Azadirachta indica
    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}]

from The Collaborative International Dictionary of English v.0.48

azadirachtin \azadirachtin\ n.
   1. a triterpenoid ({C35H44O16}) isolated from the seeds of
      the neem tree ({Azadirachta indica}), used as an
      insecticide.
      [WordNet 1.5 +PJC]