Wikipedia
Hereditarnia
Hereditarnia is a virtual pleasant place that is related to the development of the theory of hereditary properties of graphs (a part of graph theory). Hereditarnia is a special word that cannot be found in any dictionary. It was invented by Izak Broere. It is a combination of English word heredity and a quite common Polish suffix 'arnia' that is used in many words denoting pleasant places like kwiaciarnia, piwiarnia, Palmiarnia Zielenogórska, winiarnia, etc.