Duple

A communication system that can carry information in both directions, at the same time is called a duplex system. In CCTV, duplex is often used to describe the type of multiplexer that can perform two functions simultaneously, recording in multiplex mode and playback in multiplex mode. It can also refer to duplex data communication between a matrix...
Found on http://www.zoo.co.uk/~z0001325/Glossary.html

Duple

Du'ple adjective [ Latin duplus . See Double .] Double. Duple ratio (Math.) , that in which the antecedent term is double the consequent, as of 2 to 1, 8 to 4, etc.
Found on http://www.encyclo.co.uk/webster/D/132

Duple

• (a.) Double.
Found on http://thinkexist.com/dictionary/meaning/duple/
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