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bursa of Fabricius

Fabricius www.ask.com/Fabricius Find Fabricius Q&A Results Fabricius

noun Ornithology.

a lymphoid gland of the cloaca in birds, believed to function in disease resistance, and closing or disappearing as the bird ages.

Origin:
after Hieronymus Fabricius ab Aquapendente (1537–1619), Italian anatomist, who discovered it

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bursa of Fabricius is always a great word to know.

So is bezoar. Does it mean:

an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

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