acoptic

Etymology
Introduced by the mathematician to clarify terminology in the geometry of polygons and polyhedra. From.

Adjective

 * 1)  Not self-intersecting.
 * 2) * 1999, Branko Grünbaum, "Acoptic polyhedra", Advances in discrete and computational geometry (South Hadley, MA, 1996) (PDF), Contemp. Math., 223, Amer. Math. Soc., Providence, RI, pp. 163–199, doi:10.1090/conm/223/03137, MR 1661382.

Antonyms

 * nonacoptic