Cerium - Definition
cerium
n 1: a ductile grey metallic element of the lanthanide series;
used in lighter flints; the most abundant of the rare-earth
group [syn: cerium, Ce, atomic number 58]
n 1: a ductile grey metallic element of the lanthanide series;
used in lighter flints; the most abundant of the rare-earth
group [syn: cerium, Ce, atomic number 58]