Environmental Studies
- natural
- Natural disasters
- natural remanent magnetism
- Natural resources
- nature reserve
- nautical mile
- near-natural community
- near-shore current system
- Nearctic faunal region
- nearest-neighbour analysis
- nearest-neighbour sampling method
- nematocyst
- Neo-Darwinism
- neo-Lamarckism
- Neogene
- Neotropical faunal region
- Neotropical floral kingdom
- neotype
- nepheloid layer
- neritic zone