Body Location or Region
chin Audio
chin [ chin ]
Subclass of:
Mandible; Face
Definitions related to chin:
  • The anatomical frontal portion of the mandible, also known as the mentum, that contains the line of fusion of the two separate halves of the mandible (symphysis menti). This line of fusion divides inferiorly to enclose a triangular area called the mental protuberance. On each side, inferior to the second premolar tooth, is the mental foramen for the passage of blood vessels and a nerve.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • (mentum) The part of the face below the lower lip and including the protruding part of the lower jaw.
    NCI
    U.S. National Cancer Institute, 2021
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