noun. any taillike structure.
1. Noun, singular or mass Lumbosacral stenosis syndrome also known as cauda equine is arthritis of the joints between the lumbar vertebra and the sacrum. 2. Adjective This can be a symptom of cauda equina syndrome, which is a loss of function of the nerve roots. 3. Verb, base form When a lumbar disc herniates and causes conus medullaris or cauda equina damage, these sphincters may not function properly.