• A clear, transparent, sometimes faintly yellow and slightly opalescent fluid that is collected from the tissues throughout the body, flows in the lymphatic vessels (through the lymph nodes), and is eventually added to the venous blood circulation. Lymph consists of a clear liquid portion, varying numbers of white blood cells (chiefly lymphocytes), and a few red blood cells.
  NCI
  U.S. National Cancer Institute, 2021
• The clear fluid that travels through the lymphatic system and carries cells that help fight infections and other diseases.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• The interstitial fluid that is in the LYMPHATIC SYSTEM.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Transparent slightly yellow fluid found in the lymphatic vessels; contains lymphocytes; it is derived from the tissue fluids, collected from all parts of the body and returned to the blood via the lymphatic system.
  CRISP Thesaurus
  National Institutes of Health, 2006
• Transudate contained in the lumen of lymphatic vessel.
  Digital Anatomist
  University of Washington, 2003
• Lymph, pale fluid that bathes the tissues of an organism, maintaining fluid balance, and removes bacteria from tissues; it enters the blood system by way of lymphatic channels and ducts. Prominent among the constituents of lymph are lymphocytes and macrophages, the primary cells of the immune...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025