collocutor
noun
a person who talks or engages in conversation with another
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for collocutor
Historical Examples of collocutor
The Collocutor maintains that there is bad gain, as well as good gain.