DICT.TW Dictionary Taiwan

 pons asi·no·rum /ˈpɑnzˌæsəˈnorəm, ˈnɔr-/

 Pons n.; pl. Pontes   Anat. A bridge; -- applied to several parts which connect others, but especially to the pons Varolii, a prominent band of nervous tissue situated on the ventral side of the medulla oblongata and connected at each side with the hemispheres of the cerebellum; the mesocephalon. See Brain.
 Pons asinorum.  See Asses'  bridge, under Ass.
 ◄ ►

 pons asinorum
      n : a problem that severely tests the ability of an
          inexperienced person