◌̅ U+0305, ̅
Combining Diacritical Marks ◌̆
U+203E, ‾

General Punctuation
See also: ◌̿, ◌̲, and ◌̳





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. (mathematics) 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. (mathematics) Indicates the complex conjugate of a complex number.
    = i̅y̅ = xiy
  5. (statistics) Used to mark the mean of a sample.
    (sense 6) used for ten thousand as the logo of the Long Now Foundation
    (Roman numerals) 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. (phonetics) marks a string of syllables or segments with high pitch. Compare ˹ ... ˺.
  9. (actuarial notation) Used to indicate continuous payments.
    n̅|n-year annuity payable continuously

See also

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

Further reading