deltohedron
noun
del·to·he·dron
-ˈhēdrən
plural deltohedra
-drə
: a solid (such as a crystal) that is bounded by 12 quadrilateral faces and is a hemihedral form of the isometric system related to the tetrahedron
called also deltoid dodecahedron, tetragonal tristetrahedron
Word History
Etymology
New Latin, from delto- + -hedron
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