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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Ethiops  \E"thi*ops\n.  [NL.  See  {Ethiop}.]  (Old  Chem.) 
  A  black  substance;  --  formerly  applied  to  various 
  preparations  of  a  black  or  very  dark  color.  [Written  also 
  {[AE]thiops}.]  [Obs.] 
  {Ethiops  martial}  (Old  Chem.),  black  oxide  of  iron. 
  {Ethiops  mineral}  (Old  Chem.),  black  sulphide  of  mercury, 
  obtained  by  triturating  mercury  with  sulphur. 
  {Ethiops  per  se}  (Old  Chem.),  mercury  in  finely  divided 
  state,  having  the  appearance  of  a  dark  powder,  obtained  by 
  shaking  it  up  or  by  exposure  to  the  air.