1. An anteriorly concave curvature of the vertebral column; the normal kyphoses of the thoracic and sacral regions are retained portions of the primary curvature (kyphosis) of the vertebral column.
2. A forward (flexion) curvature of the spine; the thoracic spine normally has a mild kyphosis; excessive forward curvature of the thoracic spine may indicate a pathologic condition.
The information shown above for kyphosis is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.