# ◌̅

 ◌̅ U+0305, ̅ COMBINING OVERLINE
 ← ◌̄[U+0304] Combining Diacritical Marks ◌̆ →[U+0306]
 ‾ U+203E, ‾ OVERLINE
 ← ‽[U+203D] General Punctuation ‿ →[U+203F]

## Translingual

### Description

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

◌̅

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

### Diacritical mark

◌̅ (English name overbar or overline or overscore or vinculum)

1. Drawn over repeating digits.
12 ÷ 7 = 1.7̅1̅4̅2̅8̅5̅ = 1.714285714285714285...
2. (geometry) Drawn over letters which represent a line segment.
segment A̅B̅ has the same length as segment C̅D̅
3. (physics) Used to denote antiparticles.
p (proton); p̅ (antiproton)
4. Indicates the complex conjugate of a complex number.
= i̅y̅ = xiy
5. Used to mark the mean of a sample.
6. Multiplies the value of a group of digits by one thousand.
IV — four; I̅V̅ — four thousand; I̿V̿ — four million
• 2019 April, Evander Lewis Price, “[The Clock of the Long Now] Conclusions: The Interval”, in Future Momentality[1] (in English), Cambridge, Mass.: Harvard University, page 173:
Their [the Long Now Foundation’s] logo—you can’t miss it—is the decem milia, the monolithic (and chronolithic) Roman numeral for ten thousand. X marks the clock:
7. (Greek numerals) In Byzantine Greek and in Coptic, converts a letter into a digit. E.g. κ̅ (modern κʹ) '20'.
8. marks a string of syllables or segments with high pitch. Compare ˹ ... ˺.
9. Used to indicate continuous payments.
n̅|n-year annuity payable continuously