Main Entry: pi·geon breast Pronunciation: 'pij-&n- Function: noun : a rachitic deformity of the chest marked by sharp projection of the sternum —pi·geon–breast·ed/'pij-&n-'bres-t&d/adjective
pigeon breast pi·geon breast (pĭj'ən) n. A chest deformity marked by a projecting sternum, often occurring as a result of infantile rickets. Also called chicken breast, pectus carinatum.