Artificial intelligent assistant

scrowl

scrowl
  (skraʊl)
  A thin incrustation, calcareous or silicious, upon the wall of a lode.

1778 W. Pryce Min. Cornub. 99 What they call a Scrowl of the true Lode in the Cross-Gossan. 1884 R. Hunt Brit. Mining 912.


Oxford English Dictionary

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