whinstone

[hwin-stohn, win-]
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noun

Chiefly British. any of the dark-colored, fine-grained rocks, especially igneous rocks, as dolerite and basalt.

Origin of whinstone

1505–15; dial. (Scots and N England) whin whinstone (Middle English quin < ?) + stone
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British Dictionary definitions for whinstone

whinstone

noun

any dark hard fine-grained rock, such as basalt

Word Origin for whinstone

C16: from whin ² + stone
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