ileum / ilium / illium [ˈɪliəm]
ileum – n. – Anatomy the 3rd and last portion of the small intestine
ilium – n. – 1. the bone forming the upper part of each half of the human pelvis; 2. the corresponding bone in animals; 3. the alternative name of Troy, denoting especially the Greek city built there in the 7th century B.C.
Illium – n. – an alloy containing 60% nickel, 25% chromium, plus some copper, manganese, silicon and tungsten – a type of stainless steel