• (b cell) White blood cells that come from bone marrow, and produce antibodies to fight off disease.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• (b lymphocyte) A type of immune cell that makes proteins called antibodies, which bind to microorganisms and other foreign substances, and help fight infections. A B lymphocyte is a type of white blood cell.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• Immunologically important lymphocyte that is not thymus-dependent, is either short-lived and naive or long-lived and of memory phenotype, and resembles the bursa-derived lymphocyte of birds in that it is responsible for the production of immunoglobulins.
  NCI
  U.S. National Cancer Institute, 2021
• (b lymphocyte) Lymphoid cells concerned with humoral immunity; they are short lived cells resembling bursa derived lymphocytes of birds in their production of immunoglobulin upon appropriate stimulation.
  CRISP Thesaurus
  National Institutes of Health, 2006
• B cell, One of the two types of lymphocytes (the others being T cells). All lymphocytes begin their development in the bone marrow. B cells are involved in so-called humoral immunity; on encountering a foreign substance (antigen), the B lymphocyte differentiates into a plasma cell, which secretes...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025