abraum salts

from The Collaborative International Dictionary of English v.0.48

Abraum \A*braum"\ or Abraum salts \A*braum" salts\, n. [Ger.,
   fr. abr[aum]umen to remove.]
   A red ocher used to darken mahogany and for making chloride
   of potassium.
   [1913 Webster]