Is “Hexahedron” a Scrabble word?
Yes
HEXAHEDRON
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Hexahedron
/hɛksəˈhiːdɹən/
noun
1.A polyhedron with six faces. The regular hexahedron is the cube, and is one of the Platonic solids.