ˈ(t)süməˌbīt noun
( -s )
Etymology: Tsumeb, region in southwestern Africa + English -ite
: a mineral Pb 2 Cu(PO 4 )(OH) 3 .3H 2 O consisting of a hydrous basic lead copper phosphate and occurring in small emerald-green monoclinic crystals (hardness 3.5, specific gravity 6.1)