se·le·ni·um
noun/səˈliːniəm/
/səˈliːniəm/
[uncountable] (symbol Se)
- a chemical element. Selenium is a grey substance that is used in making electrical equipment and coloured glass. A lack of selenium in the human body can lead to illnesses such as depression.
硒（化学元素，用于制造电气设备和有色玻璃，人体缺此元素可致抑郁等病） Word Originearly 19th cent.: modern Latin, from Greek selēnē ‘moon’.