Source : Webster's Revised Unabridged Dictionary (1913)

Monesia \Mo*ne"sia\, n. (Pharm.)
   The bark, or a vegetable extract brought in solid cakes from
   South America and believed to be derived from the bark, of
   the tree {Chrysophyllum glycyphl[oe]um}. It is used as an
   alterative and astringent.