: a lymphocyte that is a mature antibody-secreting B cell
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The condition is a cancer that forms in a type of white blood cell called a plasma cell, according to the Mayo Clinic.—Colson Thayer, PEOPLE, 4 Feb. 2026 An explanation about plasma cells’ purpose, for example, doesn’t require any context about individual circumstances; the answer will be the same regardless of your age, gender, and general health condition.—Angela Haupt, Time, 2 Oct. 2025 Multiple myeloma is a chronic (long-term) blood cancer that affects plasma cells made in the bone marrow, which is spongy tissue found inside bones.—Lindsay Curtis, Health, 14 Sep. 2025 Though Davies planned to reunite the band for a tour in 2015, it was canceled when the musician was diagnosed with multiple myeloma, a type of cancer that attacks plasma cells.—Ryan Coleman, Entertainment Weekly, 8 Sep. 2025 See All Example Sentences for plasma cell