Encyclopedias, Almanacs, Transcripts, and Maps
- Spirit Messenger (Journal)
- Spiritoid
- Spirometer
- Spirometer
- Split-Brain Functioning
- Split-Brain Functioning
- Splitjaw Snake: Bolyeriidae
- Spondyloepiphyseal Dysplasia
- Sponges
- Sponges
- Sponges: Porifera
- Sportive Lemurs: Lepilemuridae
- Sports
- Sports Nutrition
- Sports Testing
- Sports, Bioethics of
- Sporus of Nicaea
- Sprenger, Jakob (1436-1495)
- Spriggs, George (1850-1912)
- Springhare: Pedetidae