n.
A chest deformity marked by a projecting sternum, often occurring as a result of infantile rickets. Also called chicken breast.
pigeon-breasted pi'geon-breast'ed (pĭj'ən-brĕs'tĭd) adj.
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.