duple
1. [ adjective ] consisting of or involving two parts or components usually in pairs
Synonyms: double dual
Examples:

"an egg with a double yolk" "a double (binary) star" "double doors" "dual controls for pilot and copilot" "duple (or double) time consists of a multiple of two beats to a measure"

Related terms: multiple
Similar spelling:   Duble
  duffle
  Duval
  duffel
  Dubiel
  Duvall