Two musicians who play duets together Duos often play sonata duets for violin and piano, two pianos (or one piano with four hands), or violin and cello
You can refer to two people together as a duo, especially when they have something in common. Britain's former golden Olympic duo of Linford Christie and Sally Gunnell
differentiated paper manufactured for folding whose surfaces have been differentiated Duo paper may be either plain or patterned The surfaces of plain duo are each printed a different plain colour One surface of patterned duo is printed with a pattern and the other with a plain colour