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ouge

ouge Mining. Obs.
  [Derivation unknown: cf. wough.]
  The hard or compact rock forming the sides of a metallic vein.

1747 Hooson Miner's Dict. s.v. Bind, The more nearer they resemble the Nature of the approaching Ouges, and are easily distinguished by the experienced Miner. Ibid. Q iij, The true set of the Vein is when it cuts into the hard Rock, and formes hard and firme Sides or Ouges.

Oxford English Dictionary

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