From The Collaborative International Dictionary of English v.0.48:
Pons \Pons\, n.; pl. Pontes. [L., a bridge.] (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.
[1913 Webster]
Pons asinorum. [L., literally, bridge of asses.] See
Asses' bridge, under Ass.
[1913 Webster]