1. One billionth 10^(-9); more generally, very small

Encyclopedia: Nano-

• cloven foot
• cloven hoof
• cloven-footed
• cloven-hoofed
• clover
• clover fern
• clover-leaf roll
• clover-root
• cloverleaf
• cloveroot
• Clovis
• Clovis culture
• Clovis I
• clowder
• clown
• clown anemone fish
• clown around
• clowning
• clownish
• clownishness
• clownlike
• cloy
• cloying
• cloyingly
• clozapine