actinide
actinide
ac.ti.nide AHD[²k“t…-nºd”] DJ[6#kt*7na!d] KK[6#kt*7na!d]
n.（名词）
Any of a series of chemically similar, radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).
锕类：任何化学性质相似，原子序数在89（锕）与103（铹）之间变化的放射性元素
