D2I2.
common

Spondylolisthesis

Spondylolisthesis refers to a condition in which one spinal vertebra slips out of place compared to another. While some medical dictionaries define spondylolisthesis specifically as the forward or displacement of a vertebra over the vertebra inferior to it, it is often defined in medical textbooks as displacement in any direction.

Underlined words are explained — tap any of them.

Plain-language summary adapted from Wikipedia. Not medical advice.