A spelling net for a phrase consists of the multigraph whose points are labelled with the set of distinct letters in the phrase and whose lines lie on the Eulerian path obtained in "spelling out" the phrase between the (lettered) points. Spelling nets can also use phonemes or words as labels. An eodermdrome is a non-planar spelling net. Thus, the study of structural properties of eodermdromes is the study of non-planar Eulerian multigraphs.
In this paper we summarise what is known about eodermdromes and indicate how the properties of eodermdromes have potential for linguistic research. Some of the questions with interesting linguistic implications can be asked as questions about crossing numbers of graphs. We give 21 line critical graphs with crossing number 2 which belong to a set conjectured to characterise graphs with crossing number at most 1.