1. A sky wave that is reflected by the ionosphere

Derived forms: ionospheric waves

Type of: sky wave

• oral personality
• oral phase
• oral poliovirus vaccine
• oral presentation
• Oral Roberts
• oral sex
• oral smear
• oral stage
• orally
• Oran
• orang
• orange
• orange balsam
• orange bat
• orange daisy
• orange fleabane
• Orange Free State
• orange grass
• Orange Group
• orange grove
• orange hawkweed
• orange horseshoe bat
• orange juice
• orange liqueur
• orange marmalade