The Collaborative International Dictionary of English v.0.48:

Procrustes \Pro*crus"tes\, n. [L., fr. Gr. ?, fr. ? to beat out,
   to stretch; ? forward + ? to strike.] (Gr. Antiq.)
   A celebrated legendary highwayman of Attica, who tied his
   victims upon an iron bed, and, as the case required, either
   stretched or cut of their legs to adapt them to its length;
   -- whence the metaphorical phrase,

   the bed of Procrustes.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Procrustes
    n 1: (Greek mythology) a mythical giant who was a thief and
         murderer; he would capture people and tie them to an iron
         bed, stretching them or hacking off their legs to make them
         fit; was killed by Theseus