This character is a Nonspacing Mark and inherits its script property from the preceding character. It is also used in the scripts Cyrillic, Latin, Todrhi.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+0311 prohibits a line break before it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
Inverted breve or arch is a diacritical mark, shaped like the top half of a circle ( ̑ ), that is, like an upside-down breve (˘). It looks similar to the circumflex (ˆ), which has a sharp tip (Â â Ê ê Î î Ô ô Û û), while the inverted breve is rounded: (Ȃ ȃ Ȇ ȇ Ȋ ȋ Ȏ ȏ Ȗ ȗ).
Inverted breve can occur above or below the letter. It is not used in any natural language alphabet, but as a phonetic indicator. It is identical in form to the Ancient Greek circumflex.
Representations
System
Representation (click value to copy)
Nº
785
UTF-8
CC 91
UTF-16
03 11
UTF-32
00 00 03 11
URL-Quoted
%CC%91
HTML hex reference
̑
Wrong windows-1252 Mojibake
◌̑
HTML named entity
̑
Encoding: GB18030 (hex bytes)
81 30 BE 33
LATEX
{\fontencoding{LECO}\selectfont\char177}
AGL: Latin-5
uni0311
Adobe Glyph List
breveinvertedcmb
RFC 5137
\u'0311'
Bash and Zsh inside echo -e
\u0311
C and C++
\u0311
C#
\u0311
CSS
\000311
Excel
=UNICHAR(785)
Go
\u0311
JavaScript
\u0311
Modern JavaScript since ES6
\u{311}
JSON
\u0311
Java
\u0311
Lua
\u{311}
Matlab
char(785)
Perl
"\x{311}"
PHP
\u{311}
PostgreSQL
U&'\0311'
PowerShell
`u{311}
Python
\u0311
Ruby
\u{311}
Rust
\u{311}
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