English
squaregraph
square + graph
Proto-Indo-European *kʷetwṓr ‘four’
…
Vulgar Latin *exquadrō
Vulgar Latin *exquadra
Old French esquarre ‘square’
Middle English square ‘a square’
English square
Today it means
noun a type of undirected graph that can be drawn in the plane in such a way that every bounded face is a quadrilateral and every vertex with three or fewer neighbors is incident to an unbounded face.
Sources
Sources: Wiktionary, “squaregraph”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / squaregraph