turnstile

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turnstile

Logic a symbol of the form ├, ÿE;, or ╟, used to represent logical consequence when inserted between expressions to form a sequent, or when prefixed to a single expression to indicate its status as a theorem

turnstile

[′tərn‚stīl]
(engineering)
A barrier that rotates about a vertical axis and usually is arranged to allow the passage of only one person at a time through an opening.

turnstile

A barrier which rotates on an axis and usually is so arranged as to allow the passage of a person through an opening only in one direction, one person at a time.
References in periodicals archive ?
In October 2015, the government concluded an agreement with the French company, Thales, to buy 850 smartcard turnstiles at $160 million.
Snapped up at auction after Ayresome Park was demolished, he says he originally had four turnstiles - "but two ex-players prised them away.
The turnstiles were removed from the stadium after the Main Stand was redeveloped and are going under the hammer at auctioneers Stacey's, of Essex.
Finally, the cash turnstiles were opened just 15 minutes before the game started.
Caroselli said, "Our partnerships with the leaders in security technology allow Orion ECI to integrate the latest and greatest features into our turnstiles.
The company purchased turnstiles TTR-08A for outdoor use, IP-Stiles KT-05 with SL-02 single user software with "Verification" function and updated card capture readers IC-03.
250415ATOWN Huddersfield fans on the pitch after the game which resulted in Town fans paying PS5 and Blackburn fans PS24 - or PS20 |if paying at the turnstiles on the day.
One fan Tweeted a picture of hundreds of Arsenal's 25,000-strong following stranded outside the ground with the observation: "A lot of turnstiles not working at Wembley.
M2 EQUITYBITES-July 8, 2013-Gunnebo establishes sales company with equity acquisition of its turnstile dealer in Korea(C)2013 M2 COMMUNICATIONS http://www.
5 July 2013 - Swedish security products and solutions group Gunnebo AB (STO:GUNN) on Friday said it had bought South Korean ATG Entrance Corp, a distributor of its turnstile products in the country for ten years now.
But Livi say they won't have the turnstiles repaired by then and would not be able to open Almondvale's South Stand as a result Chairman Ged Nixon said the damage will cost tens of thousands to repair.
THE shame of being stuck in the turnstiles at her beloved Manchester United convinced 26st Tegwen Morris to go on a diet.