samarskite

English Thesaurus

1. a complex black mineral occurring in pegmatites (noun.substance)

hypernym	:	mineral,
definition	:	solid homogeneous inorganic substances occurring in nature having a definite chemical composition (noun.substance)

substance holonym	:	atomic number 64, gadolinium, gd,
definition	:	a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group (noun.substance)

substance meronym	:	pegmatite,
definition	:	a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements (noun.substance)