Final answer:
The mandible is not considered to be part of the cranium.
Step-by-step explanation:
The bone that is not considered to be part of the cranium is the Mandible. The cranium, also known as the braincase, consists of eight bones including the frontal bone, parietal bone, occipital bone, and other bones. However, the mandible is part of the facial bones, which are separate from the cranium.