Source: Noto Sans Math

U+21B7 Clockwise Top Semicircle Arrow

U+21B7 was added to Unicode in version 1.1 (1993). It belongs to the block U+2190 to U+21FF Arrows in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Symbol and is commonly used, that is, in no specific script.

The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+21B7 behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “clockwise top semicircle arrow” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: clockwise top semicircle arrow.

The Wikipedia has the following information about this codepoint:

Two-dimensional rotation can occur in two possible directions. Clockwise motion (abbreviated CW) proceeds in the same direction as a clock's hands: from the top to the right, then down and then to the left, and back up to the top. The opposite sense of rotation or revolution is (in Commonwealth English) anticlockwise (ACW) or (in North American English) counterclockwise (CCW).

Representations

System	Representation
Nº	8631
UTF-8	E2 86 B7
UTF-16	21 B7
UTF-32	00 00 21 B7
URL-Quoted	%E2%86%B7
HTML hex reference	↷
Wrong windows-1252 Mojibake	â†·
HTML named entity	&curarr;
HTML named entity	&curvearrowright;
L^AT_EX	\curvearrowright

Elsewhere

Complete Record

Property	Value
Age	1.1 (1993)
Unicode Name	CLOCKWISE TOP SEMICIRCLE ARROW
Unicode 1 Name	—
Block	Arrows
General Category	Other Symbol
Script	Common
Bidirectional Category	Other Neutral
Combining Class	Not Reordered
Decomposition Type	None
Decomposition Mapping	Clockwise Top Semicircle Arrow
Lowercase	✘
Simple Lowercase Mapping	Clockwise Top Semicircle Arrow
Lowercase Mapping	Clockwise Top Semicircle Arrow
Uppercase	✘
Simple Uppercase Mapping	Clockwise Top Semicircle Arrow
Uppercase Mapping	Clockwise Top Semicircle Arrow
Simple Titlecase Mapping	Clockwise Top Semicircle Arrow
Titlecase Mapping	Clockwise Top Semicircle Arrow
Case Folding	Clockwise Top Semicircle Arrow
ASCII Hex Digit	✘
Alphabetic	✘
Bidi Control	✘
Bidi Mirrored	✘
Composition Exclusion	✘
Case Ignorable	✘
Changes When Casefolded	✘
Changes When Casemapped	✘
Changes When NFKC Casefolded	✘
Changes When Lowercased	✘
Changes When Titlecased	✘
Changes When Uppercased	✘
Cased	✘
Full Composition Exclusion	✘
Default Ignorable Code Point	✘
Dash	✘
Deprecated	✘
Diacritic	✘
Emoji Modifier Base	✘
Emoji Component	✘
Emoji Modifier	✘
Emoji Presentation	✘
Emoji	✘
Extender	✘
Extended Pictographic	✘
FC NFKC Closure	Clockwise Top Semicircle Arrow
Grapheme Cluster Break	Any
Grapheme Base	✔
Grapheme Extend	✘
Grapheme Link	✘
Hex Digit	✘
Hyphen	✘
ID Continue	✘
ID Start	✘
IDS Binary Operator	✘
IDS Trinary Operator and	✘
Ideographic	✘
Indic Mantra Category	—
Indic Positional Category	NA
Indic Syllabic Category	Other
Jamo Short Name	—
Join Control	✘
Logical Order Exception	✘
Math	✔
Noncharacter Code Point	✘
NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Casefold	Clockwise Top Semicircle Arrow
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Other Alphabetic	✘
Other Default Ignorable Code Point	✘
Other Grapheme Extend	✘
Other ID Continue	✘
Other ID Start	✘
Other Lowercase	✘
Other Math	✔
Other Uppercase	✘
Prepended Concatenation Mark	✘
Pattern Syntax	✔
Pattern White Space	✘
Quotation Mark	✘
Regional Indicator	✘
Radical	✘
Sentence Break	Other
Soft Dotted	✘
Sentence Terminal	✘
Terminal Punctuation	✘
Unified Ideograph	✘
Variation Selector	✘
Word Break	Other
White Space	✘
XID Continue	✘
XID Start	✘
Expands On NFC	✘
Expands On NFD	✘
Expands On NFKC	✘
Expands On NFKD	✘
Bidi Paired Bracket	Clockwise Top Semicircle Arrow
Bidi Paired Bracket Type	None
East Asian Width	Neutral
Hangul Syllable Type	Not Applicable
ISO 10646 Comment	—
Joining Group	No_Joining_Group
Joining Type	Non Joining
Line Break	Alphabetic
Numeric Type	None
Numeric Value	not a number
Simple Case Folding	Clockwise Top Semicircle Arrow
Script Extension
Vertical Orientation	R