turbinal vs turbinate bone

turbinal

noun
  • A turbinate bone. 

adj
  • Rolled in a spiral; scroll-like; turbinate; applied to the thin, plicated, bony or cartilaginous plates which support the olfactory and mucous membranes of the nasal chambers. 

  • Having the shape of a cone resting on its apex. 

turbinate bone

noun
  • A scrolled spongy bone of the nasal cavity. 

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