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]
WordNet (r) 3.0 (2006):
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]