noun🔗ShareأكتينيدAny 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. "اليورانيوم، وهو أكتينيد، هو معدن ثقيل يستخدم في بعض محطات الطاقة.elementchemistryscienceChat with AIVocabulary GamePractice Reading
