whinstone

whinstone

[hwin-stohn, win-]
noun
Chiefly British. any of the dark-colored, fine-grained rocks, especially igneous rocks, as dolerite and basalt.

Origin:
1505–15; dial. (Scots and N England) whin whinstone (Middle English quin < ?) + stone

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World English Dictionary
whinstone (ˈwɪnˌstəʊn)
 
n
any dark hard fine-grained rock, such as basalt
 
[C16: from whin² + stone]

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