smock. 1  a loose, lightweight overgarment worn to protect the clothing while working. 2  to clothe in a smock. 3  to draw (a fabric) by needlework into a honeycomb pattern with diamond-shaped recesses.
The term lordosis refers to the normal inward lordotic curvature of the lumbar and cervical regions of the spine. Excessive curvature of the lower back is known as lumbar hyperlordosis, commonly called hollow back or saddle back (after a similar condition that affects some horses).
Kyphosis is an excessive curve in the thoracic spine and in the sacrum/coccyx. The condition of lordosis may cause back pain as the spinal ligaments are stretched and damages, as well as putting pressure on the spinal nerves that exit at this level of the spine.