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in a theater or stadium, esp. ancient, a passageway leading to and from the seating
Latin vomitorius, alluding to the path's discharging of the spectators
1754, "passage or opening in an ancient amphitheater, leading to or from the seats," from Latin (Macrobius, Sat., VI.iv); see vomit. Erroneous meaning "place where ancient Romans (allegedly) deliberately vomited during feasts" is attested from 1923.