bursa of Fabricius
a lymphoid gland of the cloaca in birds, believed to function in disease resistance, and closing or disappearing as the bird ages.
Origin of bursa of Fabricius
after Hieronymus Fabricius ab Aquapendente (1537–1619), Italian anatomist, who discovered it
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019