orthoplex

== English == === Etymology === Coined in 1991 by John Horton Conway and Neil Sloane. Blend of orthant +‎ complex, since it has one facet for each orthant. === Pronunciation === === Noun === orthoplex (plural orthoplexes) (geometry) A convex polytope analogous to an octahedron (3 dimensions) or 16-cell (4 dimensions). ==== Synonyms ==== (polytope analogous to an octahedron): cocube, cross-polytope, hyperoctahedron ==== Hyponyms ==== (polytope analogous to an octahedron): 16-cell, 4-orthoplex, hexadecachoron, octahedron ==== Derived terms ==== 4-orthoplex ==== Related terms ==== simplex ==== See also ==== hypercube === See also === Turán graph === References ===