• (rib) Any one of the paired bones, extending from the thoracic vertebrae toward the median line on the ventral aspect of the trunk.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• (rib) Any of the paired elastic arches of bone that extend from the thoracic vertebrae toward the median line on the ventral aspect of the trunk, forming the major part of the thoracic skeleton; collectively called costae.
  CRISP Thesaurus
  National Institutes of Health, 2006
• (rib) Any one of the paired bones, 12 on either side, extending from the thoracic vertebrae toward the median line on the ventral aspect of the trunk. The long curved bones which form the rib cage. Generally, ribs 1 to 7 are connected to the sternum by their costal cartilages and are called true ribs, whereas ribs 8 to 12 are termed false ribs.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• (ribs) A set of twelve curved bones which connect to the vertebral column posteriorly, and terminate anteriorly as costal cartilage. Together, they form a protective cage around the internal thoracic organs.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Rib, any of several pairs of narrow, curved strips of bone (sometimes cartilage) attached dorsally to the vertebrae and, in higher vertebrates, to the breastbone ventrally, to form the bony skeleton, or rib cage, of the chest. The ribs help to protect the internal organs that they enclose and lend...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020