1. The lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves
   - D-layer

Derived forms: D regions

Type of: part, region

Part of: ionosphere

Encyclopedia: D region

• Thomas Bradley
• Thomas Carew
• Thomas Carlyle
• Thomas Chippendale
• Thomas Clayton Wolfe
• Thomas Crawford
• Thomas De Quincey
• Thomas Decker
• Thomas Dekker
• Thomas Edison
• Thomas Edward Lawrence
• Thomas Gainsborough
• crème de menthe
• crêpe de Chine
• crêpe paper
• crêpe rubber
• crêpe Suzette
• Cs
• CS gas
• csardas
• CSE
• CSIS
• CST
• CT
• CTC