Definition of B cell
: any of the lymphocytes that have antigen-binding antibody molecules on the surface, that comprise the antibody-secreting plasma cells when mature, and that in mammals differentiate in the bone marrow : b lymphocyte
- The glycoproteins produced by B cells, called antibodies or immunoglobulins, recognize and bind free antigens and are responsible for humoral immunity …
- —Haruo Saito et al.
- … helper T cells that induce the proliferation of the antibody-producing B cells.
- —N. A. Mitchison
- … patients have no mature B cells circulating in the bloodstream and no antibodies to fight off infections.
- —Jean Marx
