Involving three parties or elements:
— A tripartite treaty.
— A tripartite division.

synonyms: three-party, three-way.

Roget 94: trifid; trisected etc. v.; tripartite, trichotomous^†, trisulcate^†.    Triadelphous^†, triangular, tricuspid, tricapsular^†, tridental^†, tridentate, tridentiferous^†, trifoliate, trifurcate, trigonal^†, trigrammic^†, trigrammatic^†, tripetalous^†, tripodal, tripodic^†, triquetral^†, triquetrous^†.    ... show more

Polish: trypletowy, trójdzielny, trzyczęściowy, trialistyczny