The<unk> of the pelvis is divisible into two parts, the body and the ala; the separation is indicated on the internal surface by a curved line, the arcuate line, and on the external surface by the margin of the acetabulum.  The name comes from the Latin, meaning "groin" or "flank."
Ilium 
Opium
Nylon
Cineole
Silane
Cilium
Wart
Ether