Source : Webster's Revised Unabridged Dictionary (1913)

Vomitory \Vom"i*to*ry\, a. [L. vomitorious.]
   Causing vomiting; emetic; vomitive.

Vomitory \Vom"i*to*ry\, n.; pl. {Vomitories}.
   1. An emetic; a vomit. --Harvey.

   2. [L. vomitorium.] (Arch.) A principal door of a large
      ancient building, as of an amphitheater.

            Sixty-four vomitories . . . poured forth the immense
            multitude.                            --Gibbon.

Source : WordNet®

vomitory
     n : an entrance to an amphitheater or stadium