Where does “rectagraph” come from?

rectagraph (English) comes from English rectangle, from Latin rectangulum, from Latin rēctus, from Latin regō, from Proto-Italic regō, from Proto-Indo-European h₃réǵeti, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.

rectagraph (English): A triangle-free connected graph where any two...

Definitions

  1. A triangle-free connected graph where any two...

Ancestry of “rectagraph”, step by step

rectagraph traces back through two separate lines of ancestry.

via English rectangle

StepLanguageWordMeaning
1EnglishrectangleA quadrilateral having opposing sides parallel...
2Latinrectangulumnominative neuter singular of rēctangulus;...
3Latinrēctusled straight along, drawn in a straight line, straight, upright
4Latinregōto rule, govern, direct
5Proto-Italicregō
6Proto-Indo-Europeanh₃réǵetito be straightening, to be setting upright
7Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via English graph

StepLanguageWordMeaning
1EnglishgraphA data chart intended to illustrate the...
2Ancient Greekγράφωto scratch, cut into; to draw, sketch, paint; to...
3Proto-Hellenicgrəpʰōto scratch, cut or carve into
4Proto-Indo-Europeangerbʰ-to carve
5Proto-Indo-Europeanger-to turn, bend, twist, wind; to tie, bind...
Every word from Proto-Indo-European h₃reǵ-