Graywacke Definition

grāwăk, -wăkə
noun
A nonporous, dark-colored sandstone containing angular particles of other rocks.
Webster's New World
A fine-grained conglomerate resembling sandstone.
Webster's New World

Alternative form of greywacke.

Wiktionary

Other Word Forms of Graywacke

Noun

Singular:
graywacke
Plural:
graywackes

Origin of Graywacke

  • Partial translation of German Grauwacke grau gray Wacke rock (from Middle High German) (from Old High German waggo boulder wegh- in Indo-European roots)

    From American Heritage Dictionary of the English Language, 5th Edition

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graywacke