レアアースレアアースFreq.FrequencyTop 100,000じ字FuriganaMeanings1nounrare earth; rare-earth elementchemistry›Chemistry term referring to a group of 17 metallic elements. Often used in compounds like レアアース磁石 (rare-earth magnet).See also: 希土類元素スマートフォンにはレアアースが使
