/loin/
Noun, pl. loins
1. (Anatomy) Refers to the side of the human body below the rib cage to just above the pelvis. It is frequently used to reference the general area below the ribs. While the term “loin” is generally not used in medical science, some disorders do contain it. (wikipedia.org)
2. The part of the body (of humans and quadrupeds) at each side of the backbone, between the ribs and hips. (wiktionary.org)
3. Any of several cuts of meat taken from this part of an animal (wiktionary.org); a cut of meat taken from the side and back of an animal between the ribs and the rump (wordnetweb.princeton.edu).
Word origin: From Old French loigne “hip, haunch, lumbar region.”