vomitorium

[…] the way that the greatest width of the interior of the Flavian amphitheatre would be ascertained, if a line were drawn from one of the vomitoria of the west side, in the uppermost story, to the eastern vomitorium, precisely facing it.

In the rich man's house the vomitorium became an essential chamber: the place where the guzzler of rich food emptied his stomach, so that he might come back to the feast for more.