Last modified on 31 August 2012, at 21:53
eicosaedrum (plural eicosaedrums)
- Obsolete form of icosahedron.
- 1662, Henry More, An Antidote Against Atheism, Appendix, A Collection of Several Philosophical Writings of Dr. Henry More, p. 5189:
- "... That there are Five regular Bodies in Geometry, neither more nor less, viz., the Cube, the Tetraedrum, the Octaedrum, the Dodecaedrum and the Eicosaedrum ..."