The name given to the tracks made by an animal (some by Trilobita) as it crawled over the sea floor. The tracks are bilobed in appearance, divided along the mid-line, and each half is scored by fine grooves created by the action of the walking limb. See repichnia.
Cruziana
- narrowcasting
- narrow money
- Narva, Battle of (30 November 1700)
- Narváez, Pánfilo de (1478–1528)
- narwhal
- NAS
- NASA
- NASA Communications Network
- NASA Infrared Telescope Facility
- nasal cavity
- NASA Space Science Data Coordinated Archive
- nascent hydrogen
- NASCOM
- NASDA
- Naseby, Battle of (14 June 1645)
- Nash bargaining
- Nash equilibrium
- Nash, John F.
- Nash, John Forbes (1928–2015)
- Nash, Richard (1674–1762)
- Nash, Sir Walter (1882–1968)
- Nasir (or Nasser) Eddin
- NASM
- Nasmyth focus
- Nasser, Gamal Abdel (1918–70)