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B cell

any of the lymphocytes not derived from the thymus, that mature in the bone marrow and help to build antibodies

Origin: < b(ursa of Fabricius), a structure in birds analogous to the human thymus

See B cell in American Heritage Dictionary 4

noun

Any of the lymphocytes that mature in the bone marrow and, when stimulated by a particular antigen, differentiate into plasma cells. Also called B lymphocyte.

Origin:

Origin: b(ursa-dependent) cell

Origin: , after the bursa of Fabricius, a gland in birds where the cells mature and the first such tissue found in vertebrates

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