F-layer
noun
The highest and most strongly ionized region of the ionosphere.
Origin
1920s: arbitrary use of F + layer.
- parietal fossa
- parietal lobe
- parietal lobule
- parietal peritoneum
- parietal pleura
- parietal tuber
- parietary
- parietin
- parietosplanchnic
- parietovisceral
- parification
- parigot
- parikrama
- parilla
- parillin
- pari-mutuel
- paring knife
- parings
- pari passu
- paripinnate
- Paris
- Paris binding
- Paris blue
- Paris bun
- Paris club