The Collaborative International Dictionary of English v.0.48:

Jordan \Jor"dan\, Jorden \Jor"den\, n. [Prob. fr. the river
   Jordan, and shortened fr. Jordan bottle a bottle of water
   from the Jordan, brought back by pilgrims.]
   [1913 Webster]
   1. A pot or vessel with a large neck, formerly used by
      physicians and alchemists. [Obs.] --Halliwell.
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   2. A chamber pot. [Obs.] --Chaucer. --Shak.
      [1913 Webster]