(anatomy) An unpaired artery that is formed by the union of the two vertebral arteries, runs forward within the skull just under the pons, divides into the two posterior cerebral arteries, and supplies the pons, cerebellum, posterior part of the cerebrum, and the inner ear.

Alternative form of Basilideanism

The beliefs and practices of the Basilidean sect.

(historical) The wife of the archon basileus in her ceremonial capacity, which included taking part in a sacred ritual marriage to the god Dionysus.