witts

witts (uncountable)

1. (mining, UK, dialect, Cornwall) Tin ore freed from earthy matter by stamping.
   • 1852, Charles Tomlinson, Cyclopædia of Useful Arts, Mechanical and Chemical:

     the clean witts contain native oxide of tin, black or rosin-tin, and wolfram […]

• “witts”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• Twist, twist, twits