noun🔗Share锕系元素 Any of the 14 radioactive elements of the periodic table that are positioned under the lanthanides, to which they have similar chemistry."Uranium, an actinide, is a heavy metal used in some power plants. "铀是一种锕系元素，是一种重金属，被用于一些发电厂。elementchemistryscienceChat with AIVocabulary GamePractice Reading
