Source : Webster's Revised Unabridged Dictionary (1913)

Opobalsam \Op`o*bal"sam\, Opobalsamum \Op`o*bal"sa*mum\, n. [L.
   opobalsamum, Gr. ?; ? vegetable juice + ? balsam.] (Med.)
   The old name of the aromatic resinous juice of the
   {Balsamodendron opobalsamum}, now commonly called {balm of
   Gilead}. See under {Balm}.