Encyclopedias, Almanacs, Transcripts, and Maps
- Scorpaeniformes I (Gurnards and Flatheads)
- Scorpaeniformes II (Scorpionfishes and Relatives)
- Scorpaeniformes III (Greenlings, Sculpins, and Relatives)
- Scotch Broom
- Screamers (Anhimidae)
- scree
- Scriabin, Alexander Nicolas
- scriptures
- Scrub-Birds (Atrichornithidae)
- Scyphozoa (Jellyfish)
- Scythian Religion
- SDLP
- SDP
- sea cow
- Sea Level Change
- Sea Shepherd Conservation Society
- Sea Turtles
- Seabed Disposal
- Seabrook Nuclear Reactor
- seafloor