cingulum

noun

1. The girdle of an alb.
2. A collection of white matter fibers projecting from the cingulate gyrus to the entorhinal cortex in the brain, allowing for communication between components of the limbic system.
3. A ridge that girdles the base of an upper molar tooth.
4. A distinct girdle or band of color; a raised spiral line as seen on certain univalve shells.
5. The clitellus of earthworms.