n. 十字转门

[ noun ]
a gate consisting of a post that acts as a pivot for rotating arms; set in a passageway for controlling the persons entering
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Turnstile \Turn"stile`\, n.
1. A revolving frame in a footpath, preventing the passage of
horses or cattle, but admitting that of persons; a
turnpike. See {Turnpike}, n., 1.

2. A similar arrangement for registering the number of
persons passing through a gateway, doorway, or the like.