Final answer:
Lordosis, also known as swayback, refers to the condition where there is an excessive anterior curvature of the lumbar region of the vertebral column.
Step-by-step explanation:
The abnormal vertebral curve that exhibits an exaggerated lumbar curve is called lordosis. This condition, also known as swayback, is characterized by an excessive anterior curvature of the lumbar vertebral column. The development of lordosis can be commonly associated with obesity or late pregnancy, where the accumulation of body weight in the abdominal region results in an anterior shift in the center of gravity. This shift causes an anterior tilt of the pelvis and enhances the lumbar curve.