Definitions

Ilium

Ilium

[il-ee-uhm]
Ilium: see Troy.
or Ilium

Ancient city in Troas, northwestern Anatolia. It holds an enduring place in both literature and archaeology. In literature, it is well known as the location of the Trojan War. The archaeological site, a huge mound at modern Hisarlinodotk, Tur., on the Menderes (Scamander) River, was first excavated by archaeologist Heinrich Schliemann (1870–90). It consists of nine major layers dating from the early Bronze Age to Roman times (circa 3000 BC–4th century AD). In Greek legend, the city was besieged by the Greeks for 10 years and finally destroyed. Its story is told in Homer's Iliad and Odyssey and in Virgil's Aeneid. Whether the site is the actual city of these works is still debated, but the archaeological evidence indicates that a city (Troy VIIa) was destroyed at that location circa 1260–40 BC and likely was the Homeric Troy. The ruins were designated a UNESCO World Heritage site in 1998.

Learn more about Troy with a free trial on Britannica.com.

For other arcuate lines, see arcuate line.
The arcuate line of the ilium is a smooth rounded border on the internal surface of the ilium. It is immediately inferior to the iliac fossa and Iliacus muscle.

It forms part of the border of the pelvic inlet.

In combination with the pectineal line, it comprises the iliopectineal line.

The arcuate line marks the border between the body (corpus) and the wing (ala) of the ilium, and, running inferior, anterior, and medial from the auricular surface to the area corresponding to the acetabulum, it also indicates where weight is transferred from the sacroiliac joint to the hip joint.

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