Dictionary.net

The part of the central nervous system lying between the medulla oblongata and the mesencephalon, ventral to the cerebellum, and consisting of a pars dorsalis and a pars ventralis.

1. Pons Varolii, a prominent white mass on the basal aspect of the brain, lying in front of the cerebellum inferiorly, between the medulla and the cerebral peduncles, from each of which it is marked off by a groove; it is convex from side to side anteriorly, and posteriorly it forms part of the floor of the fourth ventricle. 2. Any bridge-like formation connecting two more or less disjoined parts of the same structure or organ.

Structure joining two parts.

A structure connecting two parts, as the pons Varolii of the cerebellum.

L. for Bridge.

A bridge or bridgelike structure; especially the pons Varolii.