U+1F17E Negative Squared Latin Capital Letter O
U+1F17E was added in Unicode version 6.0 in 2010. It belongs to the block Enclosed Alphanumeric Supplement in the 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. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it is written from left to right. When changing direction it is not mirrored. If its East Asian Width is “narrow”, U+1F17E forms a word with similar characters, which prevents a line break inside it. Otherwise it allows line breaks around it, except in some numeric contexts.
The CLDR project calls this character “O button (blood type)” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: blood, button, O, 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 Variation Selector-16: 🅾️ See the Emojipedia for more details on this character’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 (red blood cells). For human blood transfusions, it is the most important of the 44 different blood type (or group) classification systems currently recognized by the International Society of Blood Transfusions (ISBT) as of December 2022. A mismatch in this serotype (or in various others) can cause a potentially fatal adverse reaction after a transfusion, or an unwanted immune response to an organ transplant. Such mismatches are rare in modern medicine. 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, monkeys and Old World monkeys.
Representations
| System | Representation |
|---|---|
| Nº | 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 hex reference | 🅾 |
| Wrong windows-1252 Mojibake | 🅾 |
| alias | blood type O |
| Encoding: GB18030 (hex bytes) | 94 39 89 32 |
Elsewhere
Complete Record
| Property | Value |
|---|---|
| 6.0 (2010) | |
| NEGATIVE SQUARED LATIN CAPITAL LETTER O | |
| — | |
| Enclosed Alphanumeric Supplement | |
| Other Symbol | |
| Common | |
| Left To Right | |
| Not Reordered | |
| none | |
| Negative Squared Latin Capital Letter O | |
| ✘ | |
| Negative Squared Latin Capital Letter O | |
| Negative Squared Latin Capital Letter O | |
| ✔ | |
| Negative Squared Latin Capital Letter O | |
| Negative Squared Latin Capital Letter O | |
| Negative Squared Latin Capital Letter O | |
| Negative Squared Latin Capital Letter O | |
| Negative Squared Latin Capital Letter O | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✔ | |
| Negative Squared Latin Capital Letter O | |
| Any | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| 0 | |
| 0 | |
| 0 | |
| ✘ | |
| None | |
| — | |
| NA | |
| Other | |
| — | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Yes | |
| Yes | |
| Negative Squared Latin Capital Letter O | |
| Yes | |
| Negative Squared Latin Capital Letter O | |
| Yes | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Upper | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Alphabetic Letter | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Negative Squared Latin Capital Letter O | |
| None | |
| ambiguous | |
| Not Applicable | |
| — | |
| No_Joining_Group | |
| Non Joining | |
| Ambiguous (Alphabetic or Ideographic) | |
| none | |
| not a number | |
| Negative Squared Latin Capital Letter O | |
| U |