Macron

diacritical mark

A macron ( ¯ ), from the Greek μακρόν (makrón), meaning "long", is a diacritic mark commonly placed above a single character or symbol (particularly vowels).[1]

¯
Macron
Diacritics in Latin & Greek
accent
acute( ´ )
double acute( ˝ )
grave( ` )
double grave(  ̏ )
circumflex( ˆ )
caron, háček( ˇ )
breve( ˘ )
inverted breve(   ̑  )
cedilla( ¸ )
diaeresis, umlaut( ¨ )
dot( · )
palatal hook(   ̡ )
retroflex hook(   ̢ )
hook above, dấu hỏi(  ̉ )
horn(  ̛ )
iota subscript(  ͅ )
macron( ˉ )
ogonek, nosinė( ˛ )
perispomene(  ͂ )
overring( ˚ )
underring( ˳ )
rough breathing( )
smooth breathing( ᾿ )
Marks sometimes used as diacritics
apostrophe( )
bar( ◌̸ )
colon( : )
comma( , )
period( . )
hyphen( ˗ )
prime( )
tilde( ~ )
Diacritical marks in other scripts
Arabic diacritics
Early Cyrillic diacritics
kamora(  ҄ )
pokrytie(  ҇ )
titlo(  ҃ )
Gurmukhī diacritics
Hebrew diacritics
Indic diacritics
anusvara( )
chandrabindu( )
nukta( )
virama( )
visarga( )
IPA diacritics
Japanese diacritics
dakuten( )
handakuten( )
Khmer diacritics
Syriac diacritics
Thai diacritics
Related
Dotted circle
Punctuation marks
Logic symbols
Āā
Ǟǟ
Ǡǡ
Ǣǣ
Ēē
Īī
Ōō
Ȫȫ
Ǭǭ
Ȭȭ
Ȱȱ
Ūū
Ǖǖ
Ȳȳ

Usage

In the romanization of Japanese, a letter with macron represents a long vowel.[2]

  • For example, in the Hepburn romanization system
    • kōtsū (交通) means "traffic"
    • kotsu () means "bone" or "knack"

In the written Hawaiian language, the kahakō is shown by a macron.[3]

In mathematics, a macron (or overline) is often placed above a symbol to refer to a complex conjugate,[4] a sample mean and a logical negation.[5]

References