aindexactinide./ak-tuh-nahyd/US // ˈæk təˌnaɪd //UK // (ˈæktɪˌnaɪd) //锕系,锕系元素,锕锕,锕系物Definitionsn.noun · 名词1. Chemistry.›any element of the actinide series. Level 4More words in a →