원자 번호 34번의 비금속 원소로, 반도체 성질이 있어 광전지 등에 쓰이며 생물체에 필수적인 미량 영양소이다.
The chemical element of atomic number 34, a gray crystalline nonmetal with semiconducting properties, used in photoelectric cells and as a nutritional supplement.
예문:
"Selenium is widely used in the manufacture of photoelectric cells because its electrical conductivity increases with light intensity."
"Brazil nuts are known to be one of the richest dietary sources of selenium."
"The glass industry uses selenium to decolorize glass or to produce a deep red color."