digon — English Dictionary

Noun

1. A polygon having two edges and two vertices.

   Synonyms

   bianglebigon

   Examples

   More examples (1)

   They [the students] also came upon new and unusual mathematical figures: the digon, a two-sided polygon on a spherical space, and the apeirogon, an open polygon with infinitely many sides […]. All these discoveries brought up even more questions. Is a circle a polygon? What makes an octagon an octagon – its eight vertices, its eight sides, or both? Can a polygon cross itself? Does a polygon need to be closed?

2. A pair of parallel undirected edges in a multigraph.

3. A pair of antiparallel edges in a directed graph.