ˈstēnstrəˌpēn, -nˌstru̇pə̇n noun
( -s )
Etymology: Danish steenstrupine, from K. J. V. Steenstrup died 1913 Danish geologist + Danish -ine
: a mineral (La,Ca,Na)(Al,Fe,Mn)(Si,P)(O,OH,F) 4 (?) consisting of a complex silicate, phosphate, and fluoride of the rare-earth metals, calcium, sodium, aluminum, iron, and manganese, and occurring in dark brown rhombohedral crystals