Loin (noun)

1. The part of the body on either side of the spinal column, between the hip bone and the lower ribs.
2. The area of the body where the loin is located.

Origin:

Middle english: from old french loigne, from latin lumbus "loin", from lumbus "loins".

Examples:

1. He felt a pain in his loin.
2. The steak comes from the loin of the cow.
3. He had to wear a brace to support his lower back and loins.
4. The loins are a common site for back pain.
5. The king's loins were girt with gold.