1. Any notation that uses 12 different characters

Type of: mathematical notation

• contrary
• contrary to fact
• Contras
• contrast
• contrast material
• contrast medium
• contrasting
• contrastingly
• contrastive
• contrasty
• contravene
• contravention
• contredanse
• contretemps
• contribute
• contributing
• contribution
• contributive
• contributor
• contributory
• contributory negligence
• contrite
• contritely
• contriteness
• contrition