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plasma cell vs. lymphocyte

plasma cell

noun

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

lymphocyte
[lim-fuh-sahyt] / ˈlɪm fəˌsaɪt /

noun

Anatomy.
lymphocytes plural

  1. a type of white blood cell having a large, spherical nucleus surrounded by a thin layer of nongranular cytoplasm.