noun🔗ShareActínidoAny 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. "El uranio, un actínido, es un metal pesado utilizado en algunas centrales eléctricas.elementchemistryscienceChat with AIVocabulary GamePractice Reading
