The phrase "ventral side" refers to the underside or belly of a living being or an object. It is the opposite of the "dorsal side," which is the top or backside. Full definition
As a result, an additional head was formed on the ventral side, or the stomach side, of the embryo, indicating that those proteins induce tissues to form a head. (religion.blogs.cnn.com)
Country - Style Ribs are steaks made from any portion of the Chuck Eye Roll that are cut into two pieces by slicing individual steaks in half with a cut that starts at the ventral side and ends at the dorsal side (beefitswhatsfordinner.com)
Sharks have a lot of sensory organs on the ventral side of their snout, and I had read that if you grab them there, they are very sensitive and they stop doing whatever they're doing. (discovermagazine.com)