hilum

The hilum is very prominent in some species and nearly flat in others.

In central hilum starch grains the grain is laid down around the hilum in the form of concentric layers.

[The pancreas] is a hook-shaped gland, about 15 cm long, that lies transversely across the upper abdomen, with the head in the C-shaped curve of the duodenum[…], extending to the left as the body behind the stomach and ending as the tail lying against the hilum of the spleen.