bursaof Fabricius

bursa of Fa·bri·ci·us (fə-brĭshʹē-əs, -brĭshʹəs) n.

A thymuslike lymphoid gland in birds that is an outgrowth of the cloaca and the site of B cell maturation.

  [After Hieronymus Fabricius (1537-1619), Italian anatomist.]

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