Definition of "cingulum"

The girdle of an alb.  examples

(neuroanatomy) 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.  examples

(anatomy) A ridge that girdles the base of an upper molar tooth.  examples

(zoology) A distinct girdle or band of color; a raised spiral line as seen on certain univalve shells.

(zoology) The clitellus of earthworms.