turnstile
turn.stile \-.sti-l\ n 1: a post with four arms pivoted on the top set in a passageway so that per sons can pass through but cattle cannot 2: a similar device set in an entrance for controlling or counting the pers ons entering
Webster's English Dictionaryturn.stile \-.sti-l\ n 1: a post with four arms pivoted on the top set in a passageway so that per sons can pass through but cattle cannot 2: a similar device set in an entrance for controlling or counting the pers ons entering