\Mar*go"sa\, n. [Pg. amargoso bitter.] (Bot.)
A large tree of genus {Melia} ({M. Azadirachta}) found in
India. Its bark is bitter, and used as a tonic. A valuable
oil is expressed from its seeds, and a tenacious gum exudes
from its trunk. The {M. Azedarach} is a much more showy tree,
and is cultivated in the Southern United States, where it is
known as {Pride of India}, {Pride of China}, or {bead tree}.
Various parts of the tree are considered anthelmintic.
      The margosa oil . . . is a most valuable balsam for
      wounds, having a peculiar smell which prevents the
      attacks of flies.                        --Sir S.
                                               Baker.