Which term means the forward slipping movement of the body of one of the lower lumbar vertebrae on the vertebra or sacrum below it?

The term that describes the forward slipping movement of one lower lumbar vertebra over the vertebra or sacrum below it is "spondylolisthesis." This condition can result from various factors, including degenerative changes, trauma, or congenital defects, and may lead to pain and discomfort in the lower back. Treatment options vary based on severity and symptoms.