1. trigonal - Adjective
2. trigonal - Adjective Satellite
Having three angles, or corners; triangular; as, a trigonal stem, one having tree prominent longitudinal angles.
Source: Webster's dictionaryA rhombohedron is a parallelepiped with all rhombic faces; a trigonal trapezohedron is a rhombohedron with congruent rhombic faces. Source: Internet
Brown-colored protactinium(III) iodide has been reported where protactinium ions are 8-coordinated in a bicapped trigonal prismatic arrangement. Source: Internet
It consists of a trigonal prism with a technetium atom in the center and six hydrogen atoms at the corners. Source: Internet
PF 5 is a colourless gas and the molecules have trigonal bypramidal geometry. Source: Internet
Ketones are trigonal planar around the ketonic carbon, with C−C−O and C−C−C bond angles of approximately 120°. Source: Internet
Organoberkelium compounds Berkelium forms a trigonal (η 5 –C 5 H 5 ) 3 Bk metallocene complex with three cyclopentadienyl rings, which can be synthesized by reacting berkelium(III) chloride with the molten beryllocene ( Be (C 5 H 5 ) 2 ) at about 70 °C. Source: Internet