ˈzȯiˌsīt noun
( -s )
Etymology: German zoisit, from Baron Sigismund Zois von Edelstein died 1819 Slovenian nobleman + German -it -ite
: an orthorhombic mineral Ca 2 Al 3 Si 3 O 12 OH consisting of a basic calcium aluminum silicate that is related to epidote and that occurs massive or in prismatic grayish, brown, green, or rose crystals