n.
Any of various irregularly coiled helical spirochetes of the genus Borrelia, some species of which cause relapsing fever in humans, other mammals, and birds.
[New Latin, after Amédée Borrel (1867-1936), French bacteriologist.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.