Zug·un·ru·he  (tsŏŏk'ŏŏn-rōō'hə)  n. The migratory drive in animals, especially birds. [German : Zug, a pulling, move, migration; see zugzwang + Unruhe (from Middle High German unruowe, from Old High German unruowa : un-, not; see ne in Indo-European roots + ruowa, rest).] |