English dictionary
diplex
/'d/aI/pl/E/ks/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
adjective
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Pertaining to the sending of two messages in the same direction at the same time. <i>Diplex</i> and <i>contraplex</i> are the two varieties of <i>duplex</i>.
Source: webster1913