Plural of diesis; a small musical interval (a quarter-tone in some tuning systems) or a typographical symbol resembling a double dagger (‡).
From Greek 'diesis' meaning 'division' or 'distinction,' later adopted in music theory to describe a very small interval. In typography, it became a secondary dagger symbol.
The diesis is rarely used in English typography anymore, replaced by simpler footnote systems, but it represents a time when documents needed multiple levels of notes and symbols within a single page.
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