• (synovium) A thin membrane that lines joint capsules and produces synovial fluid.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• A layer of connective tissue that lines the cavities of joints, tendon sheaths, and bursae (fluid-filled sacs between tendons and bones). The synovial membrane makes synovial fluid, which has a lubricating function.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• Inner membrane of a joint capsule surrounding a freely movable joint; is loosely attached to the external fibrous capsule and secretes synovial fluid.
  CRISP Thesaurus
  National Institutes of Health, 2006
• Serous membrane that lines non-articular areas of synovial joints, bursae and tendon sheaths.
  Foundational Model of Anatomy
  University of Washington, 2017
• The connective tissue and synoviocytes that line the inner surface of the joint capsule.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• The inner layer of the connective tissue that seals the joint.
  NCI
  U.S. National Cancer Institute, 2021
• The inner membrane of a joint capsule surrounding a freely movable joint. It is loosely attached to the external fibrous capsule and secretes SYNOVIAL FLUID.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025