Source : Webster's Revised Unabridged Dictionary (1913)

Pretzel \Pret"zel\, n. [G. pretzel, bretzel. Cf. {Bretzel}.]
   A kind of German biscuit or cake in the form of a twisted
   ring, salted on the outside.

Source : WordNet®

pretzel
     n : glazed and salted cracker typically in the shape of a loose
         knot