Having a narrow, projecting chest, caused by forward curvature regarding the vertebral line.
Having a narrow, projecting upper body, brought on by forward curvature of this vertebral line.
having a chest deformity marked by a projecting breastbone caused by infantile rickets
Having that kind of chest in which the costal cartilages are carried inwards in addition to sternum is tossed forward, so the thorax resembles notably that a carinate bird. In pathology it's characteristic of rickets.