What is "hexacoordinate"

a. (context chemistry English) Having six ligands

Hexacoordinate in chemistry is a molecule with six ligands or atomic attachments arranged around a single metal atom in the centre. Most hexacoordinate species form an octahedral molecular geometry, with four ligands arranged equatorially, and two axially.

There is research that suggests some planar hexacoordinate structures of carbon may exist.