Anatomy
breast Audio
breast [ brest ]
Subclass of:
Body Regions
Definitions related to breast:
  • Glandular organ located on the chest. The breast is made up of connective tissue, fat, and breast tissue that contains the glands that can make milk.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • In humans, one of the paired regions in the anterior portion of the THORAX. The breasts consist of the MAMMARY GLANDS, the SKIN, the MUSCLES, the ADIPOSE TISSUE, and the CONNECTIVE TISSUES.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • One of two hemispheric projections of variable size situated in the subcutaneous layer over the pectoralis major muscle on either side of the chest.
    NCI
    U.S. National Cancer Institute, 2021
  • Region of pectoral part of chest, each instance of which is the modified, glandular structure on some anterior chest and which has as its parts some nipple, areola, breast proper.
    Foundational Model of Anatomy
    University of Washington, 2017
  • Subdivision of the pectoral part of the chest which consists of the nipple, areola and breast proper.
    Digital Anatomist
    University of Washington, 2003
  • Breast shape varies among patients, but knowing and understanding the anatomy of the breast ensures safe surgical planning. (See the image below.
    Medscape
    WebMD, 2025
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