the ratio of the greatest length to the greatest width of the cranium, multiplied by 100: used in comparative anthropology Compare cephalic index
cranial index n.
The ratio of the maximum breadth to the maximum length of the skull, multiplied by 100.
noun, Anatomy. 1. any of the nerves arising from the brainstem and exiting to the periphery of the head through skull openings, including 10 pairs in fish and amphibians and 12 pairs in reptiles, birds, and mammals: in humans, these are the abducens nerve, accessory nerve, auditory nerve, facial nerve, glossopharyngeal nerve, hypoglossal nerve, oculomotor […]
- Cranial root
cranial root n. Any of the roots of the accessory nerve that arise from the medulla.
- Cranial suture
cranial suture n. Any of the sutures between the bones of the skull.
- Cranial vertebra
cranial vertebra n. A segment of the skull regarded as homologous with a spinal column segment.