Rather agitated, holding live element

WordNet Word definitions in WordNet
n. any element of the lanthanide series (atomic numbers 57 through 71) [syn: rare-earth element , lanthanoid , lanthanide , lanthanon ]

Wikipedia Word definitions in Wikipedia
Rare earth may refer to: Rare earth elements , a group of elements on the periodic table Rare earth mineral , a mineral substantively composed of these elements Rare-earth magnet , a type of magnet that employs rare earth elements to increase effectiveness ...

Wiktionary Word definitions in Wiktionary
n. (context chemistry English) naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc