duple

Adjective

• consisting of or involving two parts or components usually in pairs
  • an egg with a double yolk
    
  • a double (binary) star
    
  • double doors
    
  • dual controls for pilot and copilot
    
  • duple (or double) time consists of two (or a multiple of two) beats to a measure
    

Related words

• Synonyms: 
  double , dual