Meaning of ATOMIC NUMBER 70

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WordNet Dictionary
	Definition:		[n]  a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
	Synonyms:		Yb, ytterbium
	See Also:		gadolinite, metal, metallic element, monazite, xenotime, ytterbite