vomitorium (n.) Look up vomitorium at Dictionary.com
1754, "passage or opening in an ancient amphitheater, leading to or from the seats," from Latin (Macrobius, Sat., VI.iv), from vomitare (see vomit (n.)) + -orium (see -ory). Meaning "place where ancient Romans (allegedly) deliberately vomited during feasts" is attested by 1869.