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The Collaborative International Dictionary
Tough-pitch

Tough-pitch \Tough"-pitch`\, n. (Metal.)

  1. The exact state or quality of texture and consistency of well reduced and refined copper.

  2. Copper so reduced; -- called also tough-cake.

Wiktionary
tough-pitch

n. 1 The exact state or quality of texture and consistency of well reduced and refined copper. 2 copper so reduced; called also tough-cake.