Quadruplex may refer to:
*
Quadruplex (New Orleans), a softball complex in New Orleans City Park
*
Quadruplex telegraph
The Quadruplex telegraph is a type of electrical telegraph which allows a total of four separate signals to be transmitted and received on a single wire at the same time (two signals in each direction). Quadruplex telegraphy thus implements a fo ...
, an improvement on the electrical telegraph patented in 1874 by Thomas Edison
* Two-inch
quadruplex videotape
2-inch quadruplex videotape (also called 2″ quad video tape or quadraplex) was the first practical and commercially successful analog recording video tape format. It was developed and released for the broadcast television industry in 1956 by ...
, the first practical and commercially successful videotape format
*
G-quadruplex
In molecular biology, G-quadruplex Nucleic acid secondary structure, secondary structures (G4) are formed in nucleic acids by sequences that are rich in guanine. They are helical in shape and contain guanine tetrads that can form from one, two o ...
, a four-stranded nucleic acid structure rich in guanine
* C-quadruplex, a four-stranded nucleic acid structure rich in cytosine, found in
I-motif DNA
* Quadruplex, a building split into four apartments, similar to a
duplex
*
Quadruplex locomotive, a locomotive with four sets of driving wheels
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