gyral vs rotary

gyral

adj
  • Moving circularly or spirally; gyratory; whirling. 

  • Of or pertaining to a gyrus 

rotary

adj
  • Capable of rotation. 

  • A rotary engine revolves the heads rather than having pistons go back and forth. 

noun
  • A roundabout, traffic circle. 

  • Any of the clubs making up the international Rotary International movement for community service. 

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