SE

棧空、系統擴充

硒(34號元素)

學術名詞

• 標準差：社會學
• 標準誤差：新聞傳播學
• 標準誤：新聞傳播學

英文釋義

1. a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)