1. Derived from Prussian blue 
2. Of, or derived from prussic (hydrocyanic) acid
   - hydrocyanic

Encyclopedia: Prussic

• spontaneously
• spontaneousness
• spontoon
• spoof
• spook
• spookily
• spooky
• spool
• spooler
• spoon
• spoon bread
• spoon food
• spoon-shaped
• spoonbill
• spoonbill catfish
• spoondrift
• spoonerism
• spoonfeed
• spoonfeeding
• spoonflower
• spoonful
• spoonleaf yucca
• spoony
• spoor
• sporadic