English word postcranial comes from English cranial (Of or relating to the cranium, or to the skull.), English post- ((anatomy) behind. After, later.)

Detailed word origin of postcranial

Dictionary entry	Language	Definition
cranial	English (eng)	Of or relating to the cranium, or to the skull.
post-	English (eng)	(anatomy) behind. After, later.
postcranial	English (eng)	(anatomy) Relating to the portion of a vertebrate skeleton located behind and/or beneath the cranium.

Words with the same origin as postcranial