bursa of Fabricius

noun

A glandular sac opening into the cloaca of a bird, producing B cells.

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Meanings

nounbursa of Fabricius (plural bursae of Fabricius)

plural bursae of Fabricius

  1. biologyA glandular sac opening into the cloaca of a bird, producing B cells.

Origin

Named after Hieronymus Fabricius, who described it in 1621.

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Cite this entry
APA

bursa of Fabricius. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/bursa%20of%20Fabricius

MLA

“bursa of Fabricius.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/bursa%20of%20Fabricius. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “bursa of Fabricius,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/bursa%20of%20Fabricius.

Source: bursa of Fabricius on Wiktionary, CC BY-SA 4.0.