trilogical

adjective4

1. •
   Pertaining to or organized into a trilogy.

   • Scattered through his trilogical autobiography (and perhaps elsewhere in his other works) are tantalizing glimpses of his aerial adventures. — 1987
2. •
   Having three parts, branches, or stages.

   • A monstrous production, in any of whose trilogical spheres I should be very sorry for mine or me to hold a place, however exalted. — 1892
3. •
   Based on or unifying three perspectives.
4. •
   Three-way.

   • In contrast to a bilogical model, the trilogical model uses three values of branch potential during performance of computations. — 1980