hexahedron

noun

hexa·​he·​dron ˌhek-sə-ˈhē-drən 

plural hexahedrons also hexahedra ˌhek-sə-ˈhē-drə 

: a polyhedron of six faces (such as a cube)

Word History

Etymology

Late Latin, from Greek hexaedron, from neuter of hexaedros of six surfaces, from hexa- + hedra seat — more at sit

First Known Use

1571, in the meaning defined above