No symbol - wikipedia No symbol This article is about the graphic symbol used to denote prohibition. For the Japanese kana, see No ( kana ). For the No symbol, see Numero sign. This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. ( May 2016 ) The ISO 3864 - 1 prohibition sign This article contains uncommon Unicode characters. Without proper rendering support, you may see question marks, boxes, or other symbols instead of the intended characters. The international prohibition sign ( official name ), also known as a no symbol, no sign, circle - backslash symbol, nay, interdictory circle or universal no, is a red circle with a red diagonal line through it ( running from top left to bottom right ), completely enclosing a pictogram to indicate something is not permitted. The prohibition sign is sometimes seen in all - black, where color is not available. The Unicode code point for the prohibition sign is U + 20E0, Combining Enclosing Circle Backslash ( ⃠ ). It is a combining character, which means that it appears on top of the character immediately before it, so putting ♪ & # x20E0 ; ∞ & # x20E0 ; is supposed to show an eighth note inside the prohibition sign, followed by the infinity symbol inside the prohibition sign : ♪ ⃠ ∞ ⃠ ;. It also appears in the Webdings and Wingdings 2 fonts. There is also a prohibition sign emoji located at U + 1F6AB NO ENTRY SIGN ( 🚫 ), which does not combine with anything. According to the ISO standard ( and also under a UK Statutory Instrument ), the red area must take up at least 35 percent of the total area of the sign within the outer circumference of the `` prohibition sign ''. Therefore, 35 percent of everything within the outer edge of the `` no symbol '' must be the symbol. Additionally, for printed signs under the UK rules, the width of a `` no symbol '' is set at 80 percent the height of the area to which it is printed. Contents 1 Uses 2 International standards 3 Variants 4 See also 5 References 6 External links Uses The `` prohibition '' symbol is used on traffic signs, so that drivers can interpret traffic laws quickly while driving. For example : No left turn or No right turn No U-turn No parking ( English ) or No estacionarse ( Spanish ) Sometimes the symbol is used to warn drivers who are not driving motorized vehicles of dangers or prohibitions : No hitchhiking No bicycles No pedestrians By analogy, the sign is used in public places to refer to prohibited actions not having to do with traffic : No smoking ( with symbol of a lit cigarette ) or No littering ( with symbol of person littering or of litter ) or No swimming ( with symbol of swimmer in water underneath ) It is also used on packages sent through the mail and sealed boxes of merchandise that are sold in stores. Using a graphical symbol is useful when the item must be handled by people who may not all understand the same language. For example : Breakable ; do not drop Keep away from magnetic fields In product documentation, this may be accompanied by drawings of the product being threatened by the prohibited items : for instance, a cartoon of a floppy disk being menaced by horseshoe magnets. It is also used on clothing, linens, and other household products to indicate the care, treatment or cleaning of the item. For example : Do not iron Also, many companies use the `` prohibition sign '' when describing the services they offer, e.g. an insect deterrent spray brand symbol showing the `` prohibition sign '' over a mosquito. The Ghostbusters logo is a fictional example of this, although it uses a mirror image of the no symbol instead of the ISO 3864 - 1 version. International standards While the `` prohibition sign '' has been so widely used in advertising and promotions that now many variations of the design ( for example, flipped left to right or varied in hue ) are recognized by the public and considered acceptable, it is still governed by local and international standards. The standard definition of the no symbol comes from the International Organization for Standardization. In 2002, ISO 3864 - 1 was published ( a revision of a standard first published in 1984 ). The introduction includes language on the need for using as few words as possible to convey information. ISO 3864 - 1 sets the rules for the color and shape of safety signage, as well regulating the incorporation of text according to viewing distance and sign size. The range of color and shape defined in this standard for the `` prohibition symbol '' or `` no symbol '' is defined as `` a prohibition surround shape ( red circular band with a red slash going from the upper left to the lower right ) over the top of a black graphical symbol. '' Since the standard is not published freely and many examples seen in public diverge from the standard, many symbols and public signs using it have not actually been based on the official standard, but instead on inexact copies or interpretations of signs or symbols seen by each graphic artist. This has led to wide variations in color and dimensions. The most common variations seen are brighter reds than specified in the standard and either a much thinner width for the line and slash, or about the right dimensions but using the same width for the slash as the circle ( the standard specifies a width that is 80 % as wide as the circle ). For example, compare Image : No smoking symbol. png ( a non-compliant representation ) with Image : ProhibitionSign. svg ( a representation drawn using the ISO standard ). Variants In contrast, a blue filled circle with no line through it, is used as a Mandatory Action Symbol, indicating that the activity represented inside the circle is mandatory, and must be executed. Circles with red borders and no oblique line are used under the Vienna Convention on Road Signs and Signals to indicate `` No entry to vehicles with the following characteristics '' such as height, width, mass or speed. Per the European Agreement on the Vienna Convention, an oblique bar may not be used for any sign other than signs indicating no turning. An alternative use for red bordered circles is as a Mandatory Action Symbol type B. A green circle with no slash is sometimes used to mean that something is explicitly allowed, where it might otherwise assume to be prohibited, for example at an intersection where a U-turn is permitted. See also Federal Highway Administration ISO 3864 List of international common standards References Jump up ^ https://www.unicode.org/charts/PDF/U1F680.pdf Jump up ^ `` ISO Online Browsing platform ''. ISO. ISO. Retrieved 2014 - 07 - 30. Jump up ^ `` Vienna Convention on Road Signs and Signals '' ( PDF ). United Nations Economic Commission for Europe. UNECE. Retrieved 2016 - 08 - 19. Official ISO template for prohibition sign ( but not a true circle, so not ideal for vector usage ) UK Highway Code - Signs & markings International Organization for Standardization External links UK legislation regarding health and safety signs, The Health and Safety ( Safety Signs and Signals ) Regulations 1996 ( SI 341 ) UK legislation regarding road signs Working drafts for UK road signage Retrieved from `` https://en.wikipedia.org/w/index.php?title=No_symbol&oldid=836831632 '' Categories : Prohibitionism Infographics Pictograms Traffic signs Hidden categories : Articles lacking in - text citations from May 2016 All articles lacking in - text citations All articles with unsourced statements Articles with unsourced statements from October 2017 Talk Variants Contents About Wikipedia Deutsch Русский Edit links This page was last edited on 17 April 2018, at 02 : 53. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. 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Question: what is the symbol of a circle with a line through it called
Answer: international prohibition sign