neem

1. a product of the seeds of a tropical tree, Azadirachta indica, of the mahogany family, that disrupts reproduction in insects, used as an insecticide.
2. Also called neem tree, nim tree, margosa. the tree itself.

noun

1. a large tree of India, Azadirachta indica, all parts of which are useful to man: the leaves act as a natural pesticide, the fruit and seeds yield a medicinal oil, the bark is used to make a tonic, and the trunk exudes a gum