Goa powder \Go"a pow"der\ [So called from Goa, on the Malabar
coast, whither it was shipped from Portugal.]
A bitter powder (also called {araroba}) found in the
interspaces of the wood of a Brazilian tree ({Andira
araroba}) and used as a medicine. It is the material from
which chrysarobin is obtained.
[1913 Webster]