arterial vs mega

arterial

adj

  • Major, important. 

  • Of or relating to an artery. 

noun

  • A through road. 

mega

adj

  • Great; excellent. 

  • Very large. 

adv

  • extremely 

noun

  • The Steinhaus-Moser number ② 

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