caudal vs cephalic

caudal

noun
  • A caudal vertebra. 

adj
  • Toward the tail end (hind end) of the body; in bipeds such as humans, this direction corresponds to inferior. 

  • Pertaining to the tail or posterior or hind part of a body. 

cephalic

adj
  • Headlike; cephaloid. 

  • Of or relating to the brain. 

  • Of or relating to the cephalon (the head of a trilobite). 

  • Of or relating to the head. 

  • Toward the head; in bipeds such as humans, this direction corresponds to superior. 

How often have the words caudal and cephalic occurred in a corpus of books? (source: Google Ngram Viewer )