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单词 graywacke
释义

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

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更新时间:2025/2/7 21:38:09