## Translingual[edit]

### Description[edit]

A horizontal line to be placed above letters and digits. It connects to itself on either side if it's also placed over those letters.

### Punctuation mark[edit]

**◌̅**

- Used in some languages to mark abbreviations.
- Ι̅Σ̅ Χ̅Σ̅, a Greek abbreviation of
*Jesus Christ*.

### Diacritical mark[edit]

**◌̅**

- (mathematics) Drawn over repeating digits.
- 12 ÷ 7 = 1.7̅1̅4̅2̅8̅5̅ = 1.714285714285714285...

- (geometry) Drawn over letters which represent a line segment.
- segment
*A̅B̅* has the same length as segment *C̅D̅*

- (physics) Used to denote antiparticles.
*p (proton); p̅ (antiproton)*

- (mathematics) Indicates the complex conjugate of a complex number.
*z̅* = *x̅*+̅*i̅y̅* = *x*−*iy*

- (statistics) Used to mark the mean of a sample.
- (Roman numerals) Multiplies the value of a group of digits by one thousand.
*IV — four; I̅V̅ — four thousand; I̿V̿ — four million*

- (Greek numerals) In Byzantine Greek and in Coptic, converts a letter into a digit. E.g. κ̅ (modern κʹ) '20'.
- (phonetics) marks a string of syllables or segments with high pitch. Compare ˹ ... ˺.
- (actuarial notation) Used to indicate continuous payments.
*a̅*_{n̅|} ― n-year annuity payable continuously

### See also[edit]

- ◌̄ (“macron, a diacritic over a single letter that does not join to itself.”)

### Further reading[edit]