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 ?
Snapped up at auction after Ayresome Park was demolished, he says he originally had four turnstiles - "but two ex-players prised them away.
In a statement Mr Clibbens said: "Blackburn Rovers supporters paying on the day for the match highlighted that the walkup price being charged at the turnstiles for away fans was less than the pre-purchase price.
Var of stowaway while he was jumping over a turnstile
Sgt May, and PCSO Alistair Colquhoon, on patrol as part of Operation Turnstile
It has been distributing the company's product range for a decade and presently holds 70% of the South Korean market for turnstiles.
The turnstile is at the privately-owned garden centre adjacent to the National Trust run Bodnant Garden but is not connected with the Trust.
The late 19th Century turnstile from Manchester was manufactured by W.
Though the premise of turnstiles started with three-pronged, push-through stadium turnstiles, entrance technology has come a long way.
Rarely caught short for words, Morag Gray, racing's latest MBE, had no fears about what they might talk about as she stepped forward to receive her honour from the owner of Turnstile, winner of the Tennent Trophy at Hamilton only a fortnight previously.
The visitor was forced to pass through a turnstile connected to a hundred-ton jack by a series of gears and straps in order to gain access to a treasure trove of Plexiglas entombed artifacts (or "relics" in Burden's lexicon) beyond.
The company said that some 80 frequent SAS flyers were currently testing photography of their eyes to gain access through the turnstile at the gate to the aircraft at Umea Airport in Sweden.
By isolating a single quantum dot and studying its optical emission, scientists can begin designing a single photon turnstile, a device for generating single photons on demand.