from The Century Dictionary.
- noun The stalk-like tubular connection between the intestine of the vertebrate embryo and the yolk-sac.
Sorry, no etymologies found.
In the region of the yolk-stalk it is somewhat enlarged and ends in a blind sac like a caecum.
The yolk-stalk, or unclosed region of the enteron, is still of considerable extent, though its exact boundaries are not easy to determine.
At the side of this sac is seen the opening of the enteron to the yolk-stalk; the anterior and posterior intestinal portals are not distinguishable from each other.
The opening is at first wide, but is gradually narrowed into a tubular stalk, the yolk-stalk or vitelline duct.