Home U+1F100 to U+1F1FF Enclosed Alphanumeric Supplement
Glyph for U+1F17E
Source: Noto Emoji

U+1F17E NEGATIVE SQUARED LATIN CAPITAL LETTER O

U+1F17E was added to Unicode in version 6.0 (2010). It belongs to the block U+1F100 to U+1F1FF Enclosed Alphanumeric Supplement in the U+10000 to U+1FFFF Supplementary Multilingual Plane.

This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as blood type O.

The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+1F17E behaves as Ambiguous (Alphabetic or Ideographic) regarding line breaks. It has type Upper for sentence and Alphabetic Letter for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character โ€œO button (blood type)โ€ for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: blood type, O, O button (blood type).

This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with Glyph for U+FE0F Variation Selector-16: ๐Ÿ…พ๏ธ See the Emojipedia for more details on this characterโ€™s emoji properties.

The Wikipedia has the following information about this codepoint:

The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes. For human blood transfusions, it is the most important of the 43 different blood type (or group) classification systems currently recognized by the International Society of Blood Transfusions (ISBT) as of June 2021. A mismatch (very rare in modern medicine) in this, or any other serotype, can cause a potentially fatal adverse reaction after a transfusion, or an unwanted immune response to an organ transplant. The associated anti-A and anti-B antibodies are usually IgM antibodies, produced in the first years of life by sensitization to environmental substances such as food, bacteria, and viruses.

The ABO blood types were discovered by Karl Landsteiner in 1901; he received the Nobel Prize in Physiology or Medicine in 1930 for this discovery. ABO blood types are also present in other primates such as apes and Old World monkeys.

Representations

System Representation
Nยบ 127358
UTF-8 F0 9F 85 BE
UTF-16 D8 3C DD 7E
UTF-32 00 01 F1 7E
URL-Quoted %F0%9F%85%BE
HTML-Escape 🅾
Wrong windows-1252 Mojibake รฐยŸย…ยพ
alias blood type O

Elsewhere

Complete Record

Property Value
Age 6.0 (2010)
Unicode Name NEGATIVE SQUARED LATIN CAPITAL LETTER O
Unicode 1 Name โ€”
Block Enclosed Alphanumeric Supplement
General Category Other Symbol
Script Common
Bidirectional Category Left To Right
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Lowercase โœ˜
Simple Lowercase Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Lowercase Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Uppercase โœ”
Simple Uppercase Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Uppercase Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Simple Titlecase Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Titlecase Mapping Glyph for U+1F17E Negative Squared Latin Capital Letter O
Case Folding Glyph for U+1F17E Negative Squared Latin Capital Letter O
ASCII Hex Digit โœ˜
Alphabetic โœ”
Bidi Control โœ˜
Bidi Mirrored โœ˜
Composition Exclusion โœ˜
Case Ignorable โœ˜
Changes When Casefolded โœ˜
Changes When Casemapped โœ˜
Changes When NFKC Casefolded โœ˜
Changes When Lowercased โœ˜
Changes When Titlecased โœ˜
Changes When Uppercased โœ˜
Cased โœ”
Full Composition Exclusion โœ˜
Default Ignorable Code Point โœ˜
Dash โœ˜
Deprecated โœ˜
Diacritic โœ˜
Emoji Modifier Base โœ˜
Emoji Component โœ˜
Emoji Modifier โœ˜
Emoji Presentation โœ˜
Emoji โœ”
Extender โœ˜
Extended Pictographic โœ”
FC NFKC Closure Glyph for U+1F17E Negative Squared Latin Capital Letter O
Grapheme Cluster Break Any
Grapheme Base โœ”
Grapheme Extend โœ˜
Grapheme Link โœ˜
Hex Digit โœ˜
Hyphen โœ˜
ID Continue โœ˜
ID Start โœ˜
IDS Binary Operator โœ˜
IDS Trinary Operator and โœ˜
Ideographic โœ˜
Indic Mantra Category โ€”
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name โ€”
Join Control โœ˜
Logical Order Exception โœ˜
Math โœ˜
Noncharacter Code Point โœ˜
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+1F17E Negative Squared Latin Capital Letter O
NFKC Quick Check Yes
NFKD Quick Check Yes
Other Alphabetic โœ”
Other Default Ignorable Code Point โœ˜
Other Grapheme Extend โœ˜
Other ID Continue โœ˜
Other ID Start โœ˜
Other Lowercase โœ˜
Other Math โœ˜
Other Uppercase โœ”
Prepended Concatenation Mark โœ˜
Pattern Syntax โœ˜
Pattern White Space โœ˜
Quotation Mark โœ˜
Regional Indicator โœ˜
Radical โœ˜
Sentence Break Upper
Soft Dotted โœ˜
Sentence Terminal โœ˜
Terminal Punctuation โœ˜
Unified Ideograph โœ˜
Variation Selector โœ˜
Word Break Alphabetic Letter
White Space โœ˜
XID Continue โœ˜
XID Start โœ˜
Expands On NFC โœ˜
Expands On NFD โœ˜
Expands On NFKC โœ˜
Expands On NFKD โœ˜
Bidi Paired Bracket Glyph for U+1F17E Negative Squared Latin Capital Letter O
Bidi Paired Bracket Type None
East Asian Width Ambiguous
Hangul Syllable Type Not Applicable
ISO 10646 Comment โ€”
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Ambiguous (Alphabetic or Ideographic)
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+1F17E Negative Squared Latin Capital Letter O
Script Extension
Vertical Orientation U