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| bur·sa of Fa·bri·cius [ bùrssə əv fə brshəss ] |
noun |
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| Definition: |
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organ in immature bird: an organ in immature birds that produces B lymphocytes. It resembles a sac and is situated in part of the lower pelvic region cloaca.
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| [After Girolamo Fabrici (1533-1619), Italian anatomist (Latinized)] |
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