Encyclopedias, Almanacs, Transcripts, and Maps
- Semenov, Nikolai Nikolaevic
- Semeru
- Semi-Pelagianism
- semicircular canal
- Semipalatinsk
- Semipalatinsk Test Site
- semiprecious stone
- Semliki
- Semnan
- Semonides of Amorgos
- Sempach
- Semple, Ellen Churchill
- Semyonov, Nikolay Nikolayevich
- Senaah
- Senancour, Étienne Pivert de
- Senate, United States
- Seneffe
- senega snakeroot
- Seneh
- Senherib