Basilar is an adjective that describes something related to the base or bottom of something. It is derived from the Latin word 'basilicus' which means 'ROYAL'. In medicine, it is used to describe the artery at the base of the brain, which supplies blood to the cerebellum and brainstem. In anatomy, it is used to describe the lower part of the skull. In botany, it is used to describe the lowermost leaves of a plant. In zoology, it is used to describe the lowermost part of an animal's body.