English
rectagraph
Blend of rectangle + graph.
Today it means
noun A triangle-free connected graph where any two vertices have 0 or 2 common neighbors.
Sources
Sources: Wiktionary, “rectagraph”. 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 / rectagraph