trigonal
adjectiveRhombohedral.
Pertaining to a trigon; having the form of a trigon; triangular.
In entomology, triangular in cross-section; having three long edges; trihedral; prismatic: as, trigonal antennæ; trigonal joints.
In botany, same as
In anatomy, noting a triangular space at the base of the bladder. See
In anatomy, the triangular space at the base of the bladder; the trigonum.
adjectiveHaving three angles, or corners; triangular.
adjectivehaving threefold symmetry