From inter- + sphere. <span class="searchmatch">intersphere</span> (plural <span class="searchmatch">interspheres</span>) English Wikipedia has an article on: <span class="searchmatch">intersphere</span> Wikipedia (geometry) A sphere that is tangent...
<span class="searchmatch">interspheres</span> plural of <span class="searchmatch">intersphere</span>...
midsphere and sky. (sphere tangent to every edge of a polyhedron): <span class="searchmatch">intersphere</span>, inversion sphere, reciprocating sphere (intermediate sphere by which...