ˈstōkˌsīt noun
( -s )
Etymology: Sir George G. Stokes died 1903 British mathematician and physicist + English -ite
: a mineral CaSnSi 3 O 9 .2H 2 O consisting of a hydrous silicate of calcium and tin and occurring in colorless orthorhombic crystals (hardness 6, specific gravity 3.2)