Duployan Affix Low Vertical Secant

Duployan Affix Low Vertical Secant at U+1BC73 is a shorthand affix sign used with Duployan stenographic writing to add a specific modifying stroke below a shorthand outline. It belongs to the Duployan block, a Unicode block for encoding the signs of the Duployan shorthand family rather than ordinary alphabetic text. In real use, this character appears mainly in digital transcriptions, archival editions, and font tests for Duployan shorthand systems. Duployan was adapted for French and for several other languages and shorthand traditions, and affix signs like this one help represent prefixes, suffixes, or grammatical additions compactly as part of a stenographic word form. Its audience is therefore specialized: shorthand historians, linguists, typographers, and communities preserving Duployan-based materials, including systems such as Chinook writing. The character is not used as punctuation or as a general mathematical symbol; its meaning depends on the particular Duployan shorthand convention around the base outline. Support can be uneven, so in fonts without Duployan coverage it may appear as a missing-character box rather than a recognizable stenographic mark.