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optical turnstile

Syllabification: op·ti·cal turn·stile

Entry from US English dictionary

Definition of optical turnstile in English:

noun

An access control system without barriers in which those attempting to enter are evaluated by closed-circuit television or other visual means.

Definition of optical turnstile in:

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Word of the day orthoepy
Pronunciation: ôrˈTHōəpē
noun
the correct or accepted pronunciation of words