quadruplex
1. [ adjective ] having four units or components
Synonyms: quadruple quadruplicate fourfold
Examples:

"quadruple rhythm has four beats per measure" "quadruplex wire"

Related terms: multiple
Similar spelling:   quadruple
  quadruplet
  quadruplicate
  quadrupling
  quadrupedal
  quadruped
  quadriplegic
  quadriplegia