Equals
Also called equality sign, Recorde’s parallels, gemowe lines
Robert Recorde, 1557
Modern symbolsEquals meaning
The equals sign is two parallel lines of the same length. Robert Recorde introduced it in 1557 to avoid writing “is equal to.” The reason is visual: nothing is more equal than parallels.
Two parallels of one length, because nothing is more equal than that.
The name. Gemowe, twin, from Latin geminus. Recorde’s own name for the pair of lines.
Where it comes from
In The Whetstone of Witte (1557) Robert Recorde says he will set a pair of parallels, “bicause noe 2 thynges can be moare equalle,” to stop writing “is equalle to” all afternoon. Before him, an equation was a sentence. The sign won by being obvious and easy to cut in type. It is younger than the ankh and more useful than most of the cabinet.
Modern
We have the author’s sentence
As with Holtom’s peace sign, the origin is not a reconstruction. The man wrote down why the picture looks like that. Parallel lines. The reason is visual. It does not need a metaphysics of twins, though the Latin word he reached for happens to mean twin.
Geometry
A claim you can fail
The sign says these two quantities match. It does not say all things are one. A false equation is still written with it, which is how you can see that it is false. That is the difference between a tool and a blessing. Infinity, sitting nearby in the books, is what you write when the matching will not arrive.
Near this
Sources
- Robert Recorde, The Whetstone of Witte (1557)
Named when the entry depends on a text, a date, or a standard. Catalog numbers are not invented.
Your margin
Private. It stays in this browser and never joins the canon.
symbol.wiki, edited as Sigilla. Last reviewed 2 October 2026. A reading of public tradition, not a ruling.