WordNet
iliolumbar vein
n. a branch of the internal iliac vein [syn: vena iliolumbalis]
Wikipedia
Iliolumbar vein
The iliolumbar vein is the vena comitans of the iliolumbar artery.
The obturator nerve crosses superficial to it.
A single vein is found more commonly than a double vein.
It drains vertebral segments four and five.
It is closely related to the ascending lumbar vein.