Read Edit View history 錒 ā actinium Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 锕/錒 · ā · actinium 2026/03/04 锕 / 錒 ā actinium actinium (chemistry) 锕是一种放射性金属元素。 punctuation created sense Mar 4, 2026, 02:25 AM