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

Encyclopedia: Prussic

• needle rush
• needle spike rush
• needle-shaped
• needlebush
• needlecraft
• needled
• needlefish
• needlelike
• needlenose pliers
• needlepoint
• needlepoint embroidery
• needless
• needlessly
• needlewoman
• needlewood
• needlework
• needleworker
• needn't
• sugar cookie
• sugar corn
• sugar daddy
• sugar diabetes
• sugar maple
• sugar of lead
• sugar palm