Lumbar refers to the anatomical region in humans and some animals, not general lower areas. Doctors specialize in lumbar surgery due to its complexity.
Pro Tip 2/3
Pain Location
Using 'lumbar' specifies that the discomfort is in the lower spine, so don't use it for general back pain. She wears a lumbar support brace for her lower spine pain.
Pro Tip 3/3
Common Misuse
Don't confuse 'lumbar' with 'lumber', which refers to wood. They sound similar but mean different things. The lumbar vertebrae are often mistaken in pronunciation as 'lumber' vertebrae.