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.]
   [1913 Webster]

   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. Ethmoid