Definition of rauhwacke in US English:

rauhwacke

(also rauchwacke, rauwacke)

noun

Geology
  • A dolomitic limestone of the Upper Permian or Zechstein group in Germany, corresponding to the magnesian limestone of England; (more generally) a magnesian limestone thought to resemble this.

Origin

Early 19th century; earliest use found in Annals of Philosophy. From German Rauhwacke from rauh (now rau) rough + Wacke.

Pronunciation

rauhwacke

/ˈraʊvakə/