anˈgarəˌlīt noun
( -s )
Etymology: German angaralith, from Angara river, Union of Soviet Socialist Republics, its locality + German -lith -lite
: a mineral Mg 2 (Al,Fe) 10 Si 6 O 29 consisting of a magnesium aluminum iron silicate and occurring in thin black plates (sp. gr. 5.6)