The Collaborative International Dictionary of English v.0.48:

Hanseatic \Han`se*at"ic\ (h[a^]n`s[-e]*[a^]t"[i^]k), a.
   Pertaining to the Hanse towns, or to their confederacy.
   [1913 Webster]

   Hanseatic league. See under 2d Hanse.
      [1913 Webster]