arcdegree vs lobe

arcdegree

noun
  • A unit of measurement of angle equal to ¹⁄₃₆₀ of a circle's circumference. 

lobe

noun
  • Any projection or division, especially one of a somewhat rounded form. 

  • A semicircular pattern left on the ice as the skater travels across it. 

  • A clear division of an organ that can be determined at the gross anatomy level, especially one of the parts of the brain, liver or lung. 

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