pectus carinatum
/ˌpɛktəs ˌkarɪˈneɪtəm/ /ˌpɛktəs ˌkarɪˈnɑːtəm/Medicine
noun
Deformity of the chest characterized by protrusion of the sternum; pigeon breast.
Origin
Mid 19th century; earliest use found in Robley Dunglison (1798–1869), physician and medical writer. From classical Latin pectus pectus + carīnātum, neuter singular of carīnātus.