1. A toxic nonmetallic element related to sulphur 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 sulphide ores (as pyrite)
   - Se, atomic number 34

Derived forms: seleniums

Type of: antioxidant, chemical element, element

Part of: fool's gold, iron pyrite, pyrite

Encyclopedia: Selenium

• completeness
• completing
• completion
• complex
• complex absence
• complex body part
• complex conjugate
• complex fraction
• complex instruction set computer
• complex instruction set computing
• complex number
• complex quantity
• complex sentence
• complexifier
• complexify
• complexion
• complexional
• complexity
• complexly
• complexness
• compliance
• compliancy
• compliant
• compliantly
• complicacy