Macron Guide, Meaning , Facts, Information and Description

A macron (from Gr. μακρός makros "large") is a diacritic ¯ placed over a vowel originally to indicate that the vowel is long. The opposite is a breve ˘, used to indicate a short vowel. These distinctions are usually phonemic.

Upper Case		Lower Case
Character	HTML Code	Character	HTML Code
Ā	Ā	ā	ā
Ē	Ē	ē	ē
Ī	Ī	ī	ī
Ō	Ō	ō	ō
Ū	Ū	ū	ū
Ǖ	Ǖ	ǖ	ǖ
Ȳ	Ȳ	ȳ	ȳ

In Old English, the macron was used in this way (the Beowulf manuscript is a good example of this). In Latvian it is used to indicate a long A sound. In Hawaiian (where it is known as the kahakō) it is used to indicate long vowels, which in turn influence the placement of accent stress in words. Early writing in Māori; did not distinguish vowel length. Some have advocated that the double vowel orthography be used to distinguish vowel length. However, the Māori Language Commission (Te Taura Whiri) advocate a macron be used to designate a long vowel. The use of the macron is now wide spread in modern Māori writings, though many people use a diaeresis mark instead (e.g. Mäori instead of Māori) due to lack of support on computers.

It is also used in many dictionaries and textbooks to mark vowel length in languages that do not feature this diacritic in everyday use, for example it is used in the Hepburn transcription of Japanese to indicate a long vowel, as in kōtsū (交通) 'traffic' as opposed to kotsu (骨) 'bone' or 'knack (fig.)'. It is often used in modern Latin dictionaries to mark vowel length, in conjuction with the breve.

It is also used in some languages to indicate things other than length. For example, in Pinyin it is used to indicate the first of the four tones in Mandarin Chinese.

In Unicode, "combining macron" is one of the combining diacritical marks, its code is U+0304 (in HTML, ̄ or ̄). There are also several precomposed characters; their HTML/Unicode numbers are as in the table to the right.

The row before the last is the letter Uu with macron and diaeresis, used in pinyin to indicate the letter ü pronounced with the first tone.

The final row is the letter Yy with macron, used sometimes in teaching Latin.

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