Definition of augen-gneiss in English:

augen-gneiss

Pronunciation /ˈaʊɡ(ə)nnʌɪs/

noun

Geology
  • A variety of gneiss containing large grains of feldspar flattened in the direction of the banding within the rock.

Origin

Mid 19th century; earliest use found in Mining & Statistic Magazine. From German Augengneis from Augen, plural of Auge + Gneis.