lordosis

An abnormal forward curvature of the spine in the lumbar region.

The mating posture displayed by female rodents and certain other mammals, in which the back is arched downward and the hindquarters are raised.

In pathology

Abnormal curvature of the spinal column, with the convexity toward the front, in distinction from kyphosis, in which the convexity is toward the back, and from scoliosis, or lateral curvature.

Any abnormal curvature of the bones.

A curvature of the spine forwards, usually in the lumbar region.

Any abnormal curvature of the bones.

An excessive curvature of the spine, causing a hollow in the back.

an abnormal inward (forward) curvature of the vertebral column