1. The apparent surface of the imaginary sphere on which celestial bodies appear to be projected
   - celestial sphere, sphere, empyrean, firmament, heavens, welkin

Type of: surface

• 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
• genus Sepia
• genus Septobasidium
• genus Sequoia
• genus Sequoiadendron
• small print
• small screen