polyfidelitous

adj

Etymology: From poly- + fidelitous.

1. Faithful within a polyamorous relationship.

   “Although they were apart for several months, Haziq, Buford, and Noelani remained polyfidelitous as they were only interested in maintaining romantic relationships with other members of their throuple.”

   “This lack of interest in multi-party marriage among polyamorists is particularly interesting given the fact that, as mentioned above, there is often a legal marriage between at least two of the partners in a polyfidelitous group.”