> I'm not into web design but I think the core problem here is lack of accepted terminology and even awareness that this type of font is a thing.

It seems useful to name the property where character widths are consistent along their weight axis, but another case in point to support the sibling comment: I see only one other significant use of "uniwidth"[1], from 2015.

I also find "uniwidth" a poor and confusing name for this property, and "duplexed" and "multiplexed" even worse.

If I had to suggest a better alternative, I think something like "width-invariant" or "width-invariant proportional" would be clearer.

[1] https://www.fontshop.com/people/david-sudweeks/fontlists/uni...