Noun
(geometry) A polygon having two edges and two vertices.
Synonyms: biangle, bigon, (less common) diangle
(graph theory)
A pair of parallel undirected edges in a multigraph.
A pair of antiparallel edges in a directed graph.
Source: en.wiktionary.orgLarry is survived by his wife, Jennie Digon, of Cheat Lake whom he married in August of 1999. Source: Internet