ALSO CALLED

Multiplexed or Duplexed.

The term (in English) was brought up by Armenian and American type designer and teacher Hrant Papazian. Many people are still debating about which naming to choose...

In type design, the width and/or spacing of a glyph often changes depending on the weight or style to maintain visual balance. Uniwidth typefaces, however, keep the same horizontal metrics across all weights and styles of a family. It is not the same as monospace fonts, for which all glyphs share the same width—duplexed typefaces are still proportional.

This consistency facilitates digital typesetting, particularly when text changes in style dynamically (e.g., on hover or in interactive interfaces) without altering the layout.