1. A direction in music; to be played very loudly
   - fortissimo, very loudly

Encyclopedia: Ff

• cateran
• catercorner
• caterer
• catering
• caterpillar
• caterpillar track
• caterpillar tread
• caterpillar-tracked
• caterwaul
• cates
• catfish
• catgut
• Catha
• Catha edulis
• Catharacta
• Catharacta skua
• Catharanthus
• Catharanthus roseus
• Cathari
• Catharism
• Cathars
• catharsis
• Cathartes
• Cathartes aura
• cathartic