jizˈmänˌdīt, ˈjizmən- noun
or gis·mon·dine -ˌdēn
( -s )
Etymology: gismondite from gismond ine + -ite; gismondine from German gismondin, from C. G. Gismondi died 1824 Italian mineralogist + German -in -ine
: a mineral CaAl 2 Si 2 O 8 .4H 2 O consisting of a light-colored hydrous calcium aluminum silicate occurring in pyramidal crystals