columel
/ˈkɑljəmɛl/
noun
- A small column-like structure in the center of the shell of a snail or other gastropod.
- When you look inside a conch shell, you can see the columel running down the center.
- The columel of the snail shell provides support for the whorls.
- The artist carefully cleaned the columel to display the spiral pattern of the shell.