Describing interpreting that involves three parties, i.e., the two clients and the interpreter(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "triadic" in a sentence
"It is a cross plot of industrial R&D spending on the x-axis and so-called triadic patents on the y-axis."
"On the other hand, studies show that in so called "triadic" encounters, mom or dad sometimes becomes an object in the room, and the conversation is monopolized by the adult child, or the doc talks to son or daughter, inadvertently ignoring the patient."
"Getty Images/Huntstock The most compelling evidence is the count of "triadic" patent filings or grants, where an application is filed with or patent granted by all three offices for the same innovation."