dodecahedron

kaksitoistatahokas, dodekaedri puhekieltä A polyhedron with twelve faces; the regular dodecahedron has regular pentagons as faces and is one of the Platonic solids.
1707, Thomas Blount, Glossographia Anglicana Nova: Or, A Dictionary, Interpreting Such Hard Words, D. Brown, heading http://books.google.com/books?id=8jYP-B1Q9a0C&pg=RA2-PT74&dq=dodecahedron+date:1700-1725&lr=&num=20&as_brr=0 DO–DO,

Dodecahedron, (Gr.) in Geometry, is a solid Figure of 12 Sides or Faces that are regular Pentagons, it is one of the Platonick or Regular Bodies.