Turnstile
noun
1.
a structure of four horizontally revolving arms pivoted atop a post and set in a gateway or opening in a fence to allow the controlled passage of people.
2.
a similar device set up in an entrance to bar passage until a charge is paid, to record the number of persons passing through, etc.
noun
1.
a mechanical gate or barrier with metal arms that are turned to admit one person at a time, usually in one direction only
2.
any similar device that admits foot passengers but no large animals or vehicles
3.
(logic) Also called gatepost. a symbol of the form ̃⊢, ⊨, 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
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- Turntable
noun 1. the rotating disk that spins the record on a phonograph. 2. Railroads. a rotating, track-bearing platform pivoted in the center, used for turning locomotives and cars around. 3. a rotating stand used in sculpture, metalwork, and ceramics. noun 1. the circular horizontal platform that rotates a gramophone record while it is being played […]
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noun 1. (Brit) a power-operated extending ladder mounted on a fire engine US and Canadian name aerial ladder
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- Turn the clock back
see: set back , def. 3.