The Collaborative International Dictionary of English v.0.48:

Vomitory \Vom"i*to*ry\, n.; pl. Vomitories.
   1. An emetic; a vomit. --Harvey.
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   2. [L. vomitorium.] (Arch.) A principal door of a large
      ancient building, as of an amphitheater.
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            Sixty-four vomitories . . . poured forth the immense
            multitude.                            --Gibbon.
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