1. A radioactive transuranic element
   - roentgenium, Rg, element 111

Type of: chemical element, element

• genus Scomberesox
• genus Scomberomorus
• genus Scombresox
• genus Scophthalmus
• genus Scopolia
• genus Scorpaena
• genus Scorzonera
• genus Scrophularia
• genus Scutellaria
• genus Scutigera
• genus Scutigerella
• genus Sebastiana
• genus Sebastodes
• genus Secale
• genus Sedum
• genus Seismosaurus
• genus Seiurus
• genus Selaginella
• genus Selar
• genus Selenarctos
• genus Selene
• genus Selenicereus
• genus Selenipedium
• genus Senecio
• genus Senna