wall rock

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noun Mining.

the rock forming the walls of a vein.

Nearby words

  1. wall pass,
  2. wall pellitory,
  3. wall pepper,
  4. wall plate,
  5. wall plug,
  6. wall rocket,
  7. wall rue,
  8. wall socket,
  9. wall street,
  10. wall streeter

Origin of wall rock

An Americanism dating back to 1855–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for wall rock



British Dictionary definitions for wall rock

wall rock

noun

rock that is immediately adjacent to a mineral vein, fault, or igneous intrusion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012