A molecular geometry where a central atom is surrounded by five other atoms, positioned at the vertices of a bipyramid that is formed by two tetrahedra joined at their bases.

त्रिकोणीय द्विस्तंभ

English Usage: The phosphorus pentachloride has a trigonal bipyramidal structure.

Hindi Usage: फॉस्फोरस पेंटाक्लोराइड की त्रिकोणीय द्विस्तंभ संरचना है।