Ore, n.
  1. The native form of a metal, whether free and uncombined, as gold, copper, etc., or combined, as iron, lead, etc.  Usually the ores contain the metals combined with oxygen, sulphur, arsenic, etc. (called mineralizers).
  2. Mining A native metal or its compound with the rock in which it occurs, after it has been picked over to throw out what is worthless.
  3. Metal; as, the liquid ore. [R.]
  Ore hearth, a low furnace in which rich lead ore is reduced; -- also called Scotch hearth.
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