1. Pinnate-leaved European perennial having bright blue or white flowers
   - Jacob's ladder, Greek valerian, charity, Polemonium caeruleum, Polemonium van-bruntiae

Type of: polemonium

• syrinx
• Syrrhaptes
• Syrrhaptes paradoxus
• syrup
• syrupy
• sysadmin
• sysop
• systaltic
• system
• system administrator
• system call
• system clock
• system command
• system error
• system of logic
• system of macrophages
• system of measurement
• system of numeration
• system of rules
• system of weights
• system of weights and measures
• system program
• systema alimentarium
• systema digestorium
• systema lymphaticum