pseudocircle
nounEtymology From pseudo- + circle.
1
Mathematics, Sciences The finite topological space X consisting of four distinct points { a, b, c, d } with the non-Hausdorff topology a,b,c,d,a,b,c,a,b,d,a,b,a,b,∅.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.