noun🔗ShareАктинидAny 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. "Уран, актинид, является тяжелым металлом, используемым на некоторых электростанциях.elementchemistryscienceChat with AIVocabulary GamePractice Reading
