opposing China.

A large reflectarray.

(anatomy) An artery that arises from the internal carotid artery, forms the anterior portion of the circle of Willis where it is linked to the artery on the opposite side by the anterior communicating artery, and passes on to supply the medial surfaces of the cerebrum.

(anatomy) One of the three arteries in the brain that form parts of the circle of Willis; it connects the anterior cerebral arteries.

(anatomy) An artery that arises from the basilar artery either alone or by a common trunk with the labyrinthine artery, divides into branches distributed to the anterior parts of the inferior surface of the cerebellum, and gives off a branch that anastomoses with the posterior inferior cerebellar artery.

(anatomy) A groove along the anterior midline of the spinal cord that incompletely divides it into symmetrical halves.

(anatomy) A single unpaired artery that is formed by the anastomosis of a branch of the vertebral artery on each side and that descends in the anterior median fissure of the spinal cord.

(geology) An uphill-facing scarp

(anatomy) A triangular region that is a landmark in the neck, has its apex at the sternum pointing downward, and is bounded in front by the anterior midline of the neck, behind by the anterior margin of the sternocleidomastoid muscle, and above by the inferior margin of the lower jaw.

Alternative form of antigender