augengneiss

== English == === Etymology === From German Augen (“eyes”) + gneiss === Pronunciation === IPA(key): /ˈaʊ̯ɡənˌnaɪ̯sɪz/ === Noun === augengneiss (countable and uncountable, plural augengneisses) A type of metamorphic rock characterized by large, lenticular mineral grains or crystal aggregates (usually feldspar or quartz grains that have been deformed during metamorphism), resembling eyes, embedded within a finer-grained matrix.