1. The ordinal number of sixty-five in counting order
   - 65th

See also: ordinal

• Cottrell precipitator
• Cottus
• Cotula
• Cotula coronopifolia
• Coturnix
• Coturnix communis
• Coturnix coturnix
• cotyledon
• cotyloid
• cotyloid cavity
• cotyloid joint
• cotyloidal
• coucal
• couch
• couch grass
• couch potato
• couchant
• couchette
• coudé system
• coudé telescope
• Coue
• cougar
• cough
• cough drop
• cough out