1. The outer region of the Earth's atmosphere; contains a high concentration of free electrons

Derived forms: ionospheres

Type of: part, region

Part of: air, atmosphere

Encyclopedia: Ionosphere

• steprelationship
• steps
• stepsister
• stepson
• stepwise
• steradian
• stercobilinogen
• stercolith
• stercoraceous
• Stercorariidae
• Stercorarius
• Stercorarius parasiticus
• sterculia
• Sterculia acerifolia
• Sterculia apetala
• sterculia family
• Sterculia foetida
• sterculia gum
• Sterculia rupestris
• Sterculiaceae
• stere
• stereo
• stereo system
• stereobate
• stereochemistry