black tin

English

Noun

black tin (uncountable)

  1. (mining, mineralogy) Tin ore (cassiterite), when dressed, stamped and washed, ready for smelting. It is in the form of a black powder, like fine sand.[1]

References
  1. Edward H[enry] Knight (1877) “Black tin”, in Knight’s American Mechanical Dictionary. […], volumes I (A–GAS), New York, N.Y.: Hurd and Houghton […], →OCLC.
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