‡ Double Dagger Symbol
The double dagger (‡) is the third footnote mark, after the asterisk and the dagger — and in physics the marker for a transition state.
Also known as: double dagger symbol, diesis, double cross symbol, third footnote symbol.
Codes
| Symbol | ‡ | |
| Single dagger | † · U+2020 | |
| Unicode | U+2021 | |
| HTML entity (named) | ‡ · ‡ | |
| HTML entity (decimal) | ‡ | |
| HTML entity (hex) | ‡ | |
| CSS | \2021 | |
| LaTeX | \ddagger | |
| Windows Alt code | Alt + 0135 |
How to type ‡ (Double Dagger Symbol)
Hold Alt and type 0135 on the numeric keypad, then release Alt. The leading zero matters — the single dagger † is the neighbouring Alt + 0134.
Press Option + Shift + 7. (Option + t alone gives the single dagger †, or use Character Viewer and search “double dagger”.)
Type 2021, then press Alt + X to convert it to ‡. Word's footnote number format offers the * † ‡ § sequence, which is where the double dagger normally appears.
Insert → Special characters, then search “double dagger”.
Use \ddagger in math mode and \ddag in running text. The single dagger is \dagger / \dag.
Usage
- ‡ is the third reference mark. The traditional footnote order is * † ‡ § ¶ ‖, so the double dagger marks the third note on a page.
- In chemistry and physics, ‡ marks the transition state of a reaction — ΔG‡ is the Gibbs free energy of activation.
- In bibliographies and dictionaries ‡ is used as an ad-hoc marker, and in genealogy it sometimes marks a burial date where † marks the death.
- Which one to use: ‡ (U+2021) is the double dagger. Its HTML named entity is ‡ with a capital D — † with a lowercase d is the single † . That single-letter difference is the most common way to ship the wrong mark.