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English Thesaurus

1. a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds (noun.substance)

hypernym	:	metal, metallic element,
definition	:	any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. (noun.substance)

substance meronym	:	gadolinite, ytterbite,
definition	:	a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium (noun.substance)