Encyclopedias, Almanacs, Transcripts, and Maps
- Secretary Birds (Sagittariidae)
- Sediment Contamination
- Sedimentation
- Sedna
- Seebeck, Thomas Johann (1770–1831)
- Seed Bank
- Seedsnipes (Thinocoridae)
- Seepage
- Sefer Yetsirah
- Seidel, Anna Katharina
- selected earth records
- selected relative densities
- Selection Cutting
- Seleucids
- Selk'nam Religion
- Sen, Keshab Chandra
- Sengzhao
- Sense of Place
- Sensory Systems
- Sepoy Rebellion