| Anatomy. an antibody-secreting cell, derived from B cells, that plays a major role in antibody-mediated immunity. |
[plaz-muh-sahyt] 
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| plasma cell n. Any of the antibody-secreting cells found in lymphoid tissue and derived from B cells upon lymphokine stimulation and reaction with a specific antigen. Also called plasmacyte. |
plasma cell n.
An antibody-producing lymphocyte derived from a B cell upon reaction with a specific antigen. Also called plasmacyte.
| plasma cell
A lymphocyte that originates from a B cell and produces antibodies as part of a humoral immune response. See Note at antibody. |