loin Meaning, Definition & Usage

  1. noun a cut of meat taken from the side and back of an animal between the ribs and the rump
  2. noun either side of the backbone between the hipbone and the ribs in humans as well as quadrupeds
    lumbus.

WordNet

Loin noun
Etymology
OE. loine, OF. logne, F. longe, from (assumed) LL. lumbea, L. lumbus join. Cf. Lends, Lumbar, Nombles.
Definitions
  1. That part of a human being or quadruped, which extends on either side of the spinal column between the hip bone and the false ribs. In human beings the loins are also called the reins. See Illust. of Beef.

Webster 1913