graywacke
noun
gray·wacke ˈgrā-ˌwak 
-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
- Mother Carey's goose
- Mother Carey's hen
- mother cell
- mother church
- mother cloves
- mother countries
- mother country
- Mother Earth
- mother figure
- Mother Goose
- Mother Goose rhyme
- mother hen
- Mother Hubbard
- Mother Hubbards
- mother liquid
- mother liquor
- mother lode
- mother lodes
- mother mark
- Mother Nature
- mother of coal
- mother of vinegar
- mother plane
- mother right
- mother ship