bistellar

adjective3

1. •
   Involving two stars.

   • The so-called nebula in virgo—a bistellar planetary system in the retrogressive course of envelopment — 1914
2. •
   (figurative) Having two leaders or headliners.

   • Brown became overlord of much domestic policy in what Hennessy described as 'a bistellar administration with policy constellations revolving around the two stars'. — 2016
3. •
   Involving the triangulation of a surface such that each vertex is incident to at most two stars.

   • Being a particular case of a stellar exchange, a bistellar operation is topology-preserving and Β⁻¹_((σ,τ)) = Β⁻¹_((τ,σ)). — 1997