Definition
A diesis (‡) is another, more formal name for the double dagger symbol. It's a typographical mark mainly used to indicate secondary footnotes when an asterisk has already been used. In musical notation, it refers to an interval smaller than a semitone. So, it can be textual or musical! It's like a secret code in academic papers. Think of it as the asterisk's sophisticated cousin. Ultimately, it's all about adding extra detail.