# What is the name for the red circle and slash? **URL:** \ **Category:** Factual Questions\ **Created:** [February 6, 2006, 1:21pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223 "2006-02-06T13:21:31Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![lee](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lee/32/7455_2.png) [@lee](https://boards.straightdope.com/u/lee)\ **Post date:** [February 6, 2006, 1:21pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/1 "2006-02-06T13:21:31Z")
The one used as a symbol of prohibtion, often on traffic signs? I remember hearing that there was a name for it and I do not recall what it was. ---
**Author:** ![Scarlett67](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/scarlett67/32/7387_2.png) [@Scarlett67](https://boards.straightdope.com/u/Scarlett67)\ **Post date:** [February 6, 2006, 2:50pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/2 "2006-02-06T14:50:36Z")
[The universal NO symbol.](http://card.ufl.edu/visual/no.html) ---
**Author:** ![Nic2004](https://avatars.discourse-cdn.com/v4/letter/n/4491bb/32.png) [@Nic2004](https://boards.straightdope.com/u/Nic2004)\ **Post date:** [February 6, 2006, 2:52pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/3 "2006-02-06T14:52:20Z")
In Traffic Engineering we call them Prohibition Signs collectively. Like No Parking, No Left Turn and the like. ---
**Author:** ![Kalhoun](https://avatars.discourse-cdn.com/v4/letter/k/3bc359/32.png) [@Kalhoun](https://boards.straightdope.com/u/Kalhoun)\ **Post date:** [February 6, 2006, 3:17pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/4 "2006-02-06T15:17:54Z")
I call it the “Don’t” Sign. ---
**Author:** ![lee](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lee/32/7455_2.png) [@lee](https://boards.straightdope.com/u/lee)\ **Post date:** [February 6, 2006, 4:03pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/5 "2006-02-06T16:03:36Z")
It was a single word. It was a trivia question more than once on the radio. ---
**Author:** ![Nic2004](https://avatars.discourse-cdn.com/v4/letter/n/4491bb/32.png) [@Nic2004](https://boards.straightdope.com/u/Nic2004)\ **Post date:** [February 6, 2006, 4:06pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/6 "2006-02-06T16:06:08Z")
[The Manual on Uniform Traffic Control Devices (MUTCD)](http://mutcd.fhwa.dot.gov/HTM/2003/part2/part2b2.htm#section2B19) **Section 2B.19 Turn Prohibition Signs (R3-1 through R3-4, R3-18) Standard: Except as noted in the Option, where turns are prohibited, Turn Prohibition signs shall be installed.** ---
**Author:** ![Nature\_s\_Call](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/nature_s_call/32/19006_2.png) [@Nature\_s\_Call](https://boards.straightdope.com/u/Nature_s_Call)\ **Post date:** [February 6, 2006, 4:38pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/7 "2006-02-06T16:38:57Z")
Just say “no.” ---
**Author:** ![Chronos](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chronos/32/134_2.png) [@Chronos](https://boards.straightdope.com/u/Chronos)\ **Post date:** [February 6, 2006, 8:59pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/8 "2006-02-06T20:59:45Z")
I believe I’ve heard the word “interdit”, but I’m having a hard time finding any non-French sources for that online. ---
**Author:** ![pravnik](https://avatars.discourse-cdn.com/v4/letter/p/8edcca/32.png) [@pravnik](https://boards.straightdope.com/u/pravnik)\ **Post date:** [February 6, 2006, 9:01pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/9 "2006-02-06T21:01:21Z")
The “buster.” ---
**Author:** ![Hey\_It\_s\_That\_Guy](https://avatars.discourse-cdn.com/v4/letter/h/6f9a4e/32.png) [@Hey\_It\_s\_That\_Guy](https://boards.straightdope.com/u/Hey_It_s_That_Guy)\ **Post date:** [February 6, 2006, 11:13pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/10 "2006-02-06T23:13:09Z")
> [@pravnik](#): > > The “buster.” Heh, my family calls it the “buster” as well, because of Ghostbusters. ---
**Author:** ![Moirai](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@Moirai](https://boards.straightdope.com/u/Moirai)\ **Post date:** [February 7, 2006, 2:16am UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/11 "2006-02-07T02:16:00Z")
We just call it the “circle slash.” Not too clever but everybody knows what we mean. ---
**Author:** ![Otto](https://avatars.discourse-cdn.com/v4/letter/o/bbe5ce/32.png) [@Otto](https://boards.straightdope.com/u/Otto)\ **Post date:** [February 7, 2006, 2:42am UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/12 "2006-02-07T02:42:30Z")
The Nomor. ---
**Author:** ![TwistyLamp](https://avatars.discourse-cdn.com/v4/letter/t/7ba0ec/32.png) [@TwistyLamp](https://boards.straightdope.com/u/TwistyLamp)\ **Post date:** [February 7, 2006, 5:07am UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/13 "2006-02-07T05:07:40Z")
The Nomor Garriceparra? 😛 ---
**Author:** ![batsto](https://avatars.discourse-cdn.com/v4/letter/b/b2d939/32.png) [@batsto](https://boards.straightdope.com/u/batsto)\ **Post date:** [February 7, 2006, 2:21pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/14 "2006-02-07T14:21:34Z")
I used to have a book of Sniglets (remember those from the “Not Necessarily the News” segment Rich Hall used to do?) It called that thing a “Nomor”. But then, it had lots of funny and apparently made up names for other things as well. To this day though I call it a nomor, often to the confusion of others who didn’t spend as much time as I did reading my “Sniglet a Day” desk calendar. ---
**Author:** ![don\_t\_ask](https://avatars.discourse-cdn.com/v4/letter/d/e68b1a/32.png) [@don\_t\_ask](https://boards.straightdope.com/u/don_t_ask)\ **Post date:** [February 7, 2006, 2:24pm UTC](https://boards.straightdope.com/t/what-is-the-name-for-the-red-circle-and-slash/343223/15 "2006-02-07T14:24:46Z")
The Fuck You - first used for smokers I believe.