cingulum vs lemniscus

cingulum

noun
  • 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. 

  • A ridge that girdles the base of an upper molar tooth. 

  • The clitellus of earthworms. 

  • The girdle of an alb. 

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

lemniscus

noun
  • A ribbon of fibers, especially of cerebral white nerve fibers. 

  • A woollen fillet attached to the back of crowns, diadems, etc. 

  • One of two oval bodies hanging from the interior walls of the body in the Acanthocephala. 

How often have the words cingulum and lemniscus occurred in a corpus of books? (source: Google Ngram Viewer )