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Duplex (from Latin duplex, “double, two-fold”), may refer to:


Science and medicine[edit]


  • Duplex, a common electrical receptacle with two NEMA type 5 connector plugs
  • Duplex locomotive, a type of steam locomotive
  • TGV Duplex, a French high-speed train of the TGV family featuring bi-level carriages
  • Duplex printing, double-sided printing
  • Duplex (telecommunications), communication flowing in both directions simultaneously
  • Duplexing in typography, where two different styles of font (e.g. regular and bold) have the same width
  • Google Duplex, an extension of Google Assistant which allows it to carry out natural conversations by mimicking human voice


See also[edit]