plasma cell

noun

1. Anatomy. an antibody-secreting cell, derived from B cells, that plays a major role in antibody-mediated immunity.

n.

1. An antibody-producing lymphocyte derived from a B cell upon reaction with a specific antigen.plasmacyte

1. A lymphocyte that originates from a B cell and produces antibodies as part of a humoral immune response. See Note at antibody.