1. Of or belonging to astronauts or the science of astronautics
   - astronautic

See also: astronaut, astronautics

• sulfone
• sulfonic acid
• sulfonylurea
• sulfur
• sulfur bacteria
• sulfur bottom
• sulfur butterfly
• sulfur dioxide
• sulfur hexafluoride
• sulfur mine
• sulfur mustard
• sulfur oxide
• sulfur paintbrush
• sulfur-yellow
• sulfurette
• sulfuretted
• sulfuric
• sulfuric acid
• sulfurised
• sulfurized
• sulfurous
• sulfury
• Sulidae
• sulindac
• sulk