cingulum

Noun
  1. (anatomy) an encircling structure (as the ridge around the base of a tooth) (synset 105236062)
    referred to in: anatomy, general anatomy - the branch of morphology that deals with the structure of animals
    is a type of: anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing and its construction and arrangement

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