Macron below

◌̱
Macron below
Diacritics in Latin & Greek
	accent
	acute´
	double acute˝
	grave`
	double grave ̏
	circumflexˆ
	caron, háčekˇ
	breve˘
	inverted breve ̑
	cedilla¸
	diaeresis, umlaut¨
	dot·
	palatal hook ̡
	retroflex hook ̢
	hook above ̉
	horn ̛
	iota subscript ͅ
	macronˉ
	ogonek, nosinė˛
	perispomene ͂
	overring˚
	underring˳
	rough breathing῾
	smooth breathing᾿
Marks sometimes used as diacritics
	apostrophe’
	bar◌̸
	colon:
	comma,
	full stop/period.
	hyphen˗
	prime′
	tilde~
Diacritical marks in other scripts
	Arabic diacritics
	Early Cyrillic diacritics
	kamora ҄
	pokrytie ҇
	titlo ҃
	Hebrew diacritics
	Indic diacritics
	anusvaraं ং ଂ ം
	avagrahaऽ ঽ ଽ ఽ ഽ ྅
	chandrabinduँ ఁ ྃ
	nuqta़
	virama् ് ్ ್ ් ်
	visargaः ঃ ଃ ஃ
	Gurmukhī diacritics
	Khmer diacritics
	Thai diacritics
	IPA diacritics
	Japanese kana diacritics
	dakuten ﾞ
	handakuten ﾟ
	Syriac diacritics
Related
	Dotted circle◌
	Punctuation marks
	Logic symbols
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A̱a̱ḆḇC̱c̱

Macron below, U+0331 ◌̱ COMBINING MACRON BELOW, is a combining diacritical mark that is used in various orthographies.^[1]

A non-combining form is U+02CD ˍ MODIFIER LETTER LOW MACRON. It is not to be confused with U+0320 ◌̠ COMBINING MINUS SIGN BELOW, U+0332 ◌̲ COMBINING LOW LINE and U+005F _ LOW LINE. The difference between "macron below" and "low line" is that the latter results in an unbroken underline when it is run together: compare a̱ḇc̱ and a̲b̲c̲ (only the latter should look like abc).^[2]

Unicode[]

Macron below character[]

Unicode defines several characters for the macron below:

macron below
combining			spacing
character	Unicode	HTML	character	Unicode	HTML
◌̱ single	U+0331	̱	ˍ letter	U+02CD	ˍ
◌͟◌ double	U+035F	͟

There are many similar marks covered elsewhere:

Spacing underscores, including
- U+005F _ LOW LINE (HTML _ · &lowbar;, &UnderBar;)
- U+2017 ‗ DOUBLE LOW LINE (HTML ‗)
Combining underlines, including
- U+0332 ◌̲ COMBINING LOW LINE (HTML ̲)
- U+0333 ◌̳ COMBINING DOUBLE LOW LINE (HTML ̳)
- U+0347 ◌͇ COMBINING EQUALS SIGN BELOW (HTML ͇);
- U+FE2B ◌︫ COMBINING MACRON LEFT HALF BELOW (HTML ︫)
- U+FE2C ◌︬ COMBINING MACRON RIGHT HALF BELOW (HTML ︬)
- U+FE2D ◌︭ COMBINING CONJOINING MACRON BELOW (HTML ︭)
International Phonetic Alphabet mark for retracted or backed articulation:^[1]
- U+0320 ◌̠ COMBINING MINUS SIGN BELOW (HTML ̠)
- U+02D7 ˗ MODIFIER LETTER MINUS SIGN (HTML ˗)

Precomposed characters[]

Various precomposed letters with a macron below are defined in Unicode:

upper case			lower case			notes
letter	Unicode	HTML	letter	Unicode	HTML	notes
Ḇ	U+1E06	Ḇ	ḇ	U+1E07	ḇ	Used in the transliteration of Biblical Hebrew into the Roman alphabet to show the fricative value of the letter beth (ב) representing [v], or perhaps [β].
Ḏ	U+1E0E	Ḏ	ḏ	U+1E0F	ḏ	Used in the transliteration of Biblical Hebrew, Syriac and Arabic into the Roman alphabet to show the fricative value of the letter dalet (ד), [ð], and in the romanization of Pashto, it is used sometimes to represent retroflex D.
			ẖ	U+1E96	ẖ	Sometimes used for Arabic خ ẖāʼ, Hebrew Heth (letter), Egyptian WIKI

[1]

[2]