Triplex
- Chicoreus
- Concurrency (road)
- D-type Triplex (New York City Subway car)
- Geastrum triplex
- Givira triplex
- Hypercomplex number
- Metasia triplex
- Micrathetis triplex
- Multiplex (movie theater)
- Mycobacterium triplex
- Phyllonorycter triplex
- React (software)
- Rinzia triplex
- Terinebrica triplex
- Triple X (disambiguation)
- Triplex (building)
- Triplex (espionage)
- Triplex (film)
- Triplex (genetics)
- Triplex (juggling)
- Triplex (typeface)
- Triplex Cones
- Triplex Safety Glass
- Triplex locomotive
- White Triplex