ˈfilə̇pˌstäˌdīt noun
( -s )
Etymology: Philipstad, Sweden, its locality + English -ite
: a mineral approximately Ca 2 (Fe, Mg) 5 (Si, Al) 8 O 22 (OH) 2 consisting of silicate of calcium, iron, magnesium, and aluminum and belonging to the amphibole group