Synset
a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
<noun.substance>
semantic pointers
substance meronym
beryllium, Be, glucinium, atomic number 4
cerium, Ce, atomic number 58
erbium, Er, atomic number 68
gadolinium, Gd, atomic number 64
holmium, Ho, atomic number 67
terbium, Tb, atomic number 65
ytterbium, Yb, atomic number 70
yttrium, Y, atomic number 39
hypernym
