1. Of a chemical compound having a ring with four members
   - four-membered

See also: membered

• silky wisteria
• silky-haired
• silky-leafed
• silky-leaved
• sill
• sillabub
• Sillaginidae
• Sillago
• sillcock
• sillily
• silliness
• sillock
• Sills
• silly
• silly billy
• silly season
• silo
• siloxane
• Silphium
• Silphium laciniatum
• silt
• silt up
• siltstone
• silty
• Silurian