graywacke

noun

gray·​wacke ˈgrā-ˌwak How to pronounce graywacke (audio)
-ˌwa-kə
: a coarse usually dark gray sandstone or fine-grained conglomerate composed of firmly cemented fragments (as of quartz or feldspar)

Word History

Etymology

partial translation of German Grauwacke

First Known Use

1805, in the meaning defined above

Time Traveler
The first known use of graywacke was in 1805

Dictionary Entries Near graywacke

Cite this Entry

“Graywacke.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/graywacke. Accessed 21 Apr. 2024.

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