accessory hemiazygos vein
accessory hemiazygos vein n.
A vein that is formed by the union of the fourth to seventh left posterior intercostal veins, passes along the fifth, sixth, and seventh thoracic vertebrae, crosses the midline behind the aorta, esophagus, and thoracic duct, and empties into the azygos vein.
- Accessory mineral
See at (def 7). accessory mineral A mineral that is present in a minor amount in rocks and is not considered an essential constituent of the rock.
- Accessory ligament
accessory ligament accessory ligament n. A ligament around a joint that supports or supplements another.
- Accessory nerve
either one of the eleventh pair of cranial nerves, consisting of motor fibers from the spinal cord that innervate the pharyngeal, trapezius, and sternocleidomastoid muscles, and motor fibers from the brain that join the vagus to innervate the thoracic and abdominal viscera. noun either one of the eleventh pair of cranial nerves, which supply the […]
- Accessory obturator artery
accessory obturator artery accessory obturator artery n. An artery that is the pubic branch of the inferior epigastric artery when it contributes a significant supply through the obturator canal.
- Accessory pancreatic duct
accessory pancreatic duct accessory pancreatic duct n. The excretory duct of the head of the pancreas, one branch of which joins the pancreatic duct, the other opening into the duodenum. Also called Santorini’s duct.