hornfels

noun
horn·​fels | \ˈhȯrn-ˌfelz \

Definition of hornfels 

: a fine-grained silicate rock produced by metamorphism especially of slate

First Known Use of hornfels

1854, in the meaning defined above

History and Etymology for hornfels

German, from Horn horn + Fels cliff, rock

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Dictionary Entries near hornfels

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hornet's nest

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hornfish

horn fly

horn gap

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The first known use of hornfels was in 1854

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