noun🔗Share灰重石A mineral composed of calcium tungstate, with the chemical formula CaWO4; an important tungsten ore."Miners extract scheelite from the earth because it is a valuable source of tungsten. "鉱夫はタングステンの貴重な供給源である灰重石を地中から採掘します。mineralgeologychemistrysubstancematerialChat with AIVocabulary GamePractice Reading