radium

中文： 镭

1. The chemical element (symbol Ra) with an atomic number of 88. It is a soft, shiny and silvery radioactive alkaline earth metal. (countable, uncountable)
2. An atom of this element. (countable)
3. A type of cloth woven from silk or synthetic yarn, often with a shiny appearance. (countable, dated, uncountable)

复数 radiums