Encyclopedias, Almanacs, Transcripts, and Maps
- Selim II
- Seljuks
- Selkirk Mountains
- Selkirk, Thomas Douglas, 5th earl of
- Sellars, Peter
- Selous Game Reserve
- Selten, Reinhard
- Semachiah
- Semenov, Nikolai Nikolaevic
- Semeru
- Semi-Pelagianism
- semicircular canal
- Semipalatinsk
- Semipalatinsk Test Site
- semiprecious stone
- Semliki
- Semnan
- Semonides of Amorgos
- Sempach
- Semple, Ellen Churchill