actinides

noun

Any of the 14 radioactive elements of the periodic table that are positioned under the lanthanides, to which they have similar chemistry.

Similar Words

act /æk/ actability actable acted /ˈæk.tɪd/ actin actinian actinometer actinomorphic action /ˈæk.ʃən/ actionable /ˈæk.ʃə.nə.bəl/