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bursa of fabricius

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bursa of 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. 2009.
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bursa of Fa·bri·ci·us   (fə-brĭsh'ē-əs, -brĭsh'əs)   
n.  A lymphoid gland in birds that is connected to the cloaca and is the site of B cell maturation.

[After Hieronymus Fabricius (1537-1619), Italian anatomist.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: bursa of Fa·bri·cius
Pronunciation: -f&-'brish(-E)-&s
Function: noun
: a blind glandular sac that opens into the cloaca ofbirds and functions in B cell production
Fabricius, Johann Christian (1745–1808) Danish entomologist. Fabricius was one of the outstanding entomologists of his time. Astudent of Carolus Linnaeus, he is known for his extensive taxonomic research that led to his classifying insects according to the structure of their mouthparts and not of their wings. Hisentomological classification was first published in 1775 followed by another work a year later. Eventually he named and described about 10,000 insects. He is also remembered for his views on evolution.He held that new species and varieties could arise through hybridization and by environmental influences on structure and function.
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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