cidaris /sidˈə-ris/

1. A Persian royal tiara
2. (with cap) a genus of sea urchins, mostly fossil

• climbing walls
• climbs
• climb the walls
• clime
• climes
• clinal
• clinamen
• clinamens
• clinch
• clinched
• clincher
• clincher-built
• clinchers
• clincher-work
• clincher-works
• clinches
• clinching
• clindamycin
• clindamycins
• cline
• clines
• cling
• clinger
• clingers
• clingfilm