English

Noun

icosaedrum ‎(plural icosaedra)

1. Obsolete form of icosahedron.
   • 1662, Henry More, An Antidote Against Atheism, Book II, A Collection of Several Philosophical Writings of Dr. Henry More, p. 54:

     "... for example, a rightly-cut Tetraedrum, Cube or Icosaedrum have no more pulchritude in them, then any rude broken stone lying in the field or high-ways ..."