cylindrical vs elliptical

cylindrical

adj
  • Shaped like a cylinder. 

  • Describing a map projection in which meridians are mapped onto vertical lines and parallels of latitude onto horizontal lines. 

elliptical

adj
  • In a shape of, or reminding of, an ellipse; oval. 

  • Elliptic. 

  • Concise, condensed. 

  • Of, or showing ellipsis; having a word or words omitted. 

noun
  • An elliptical trainer. 

  • An elliptical galaxy. 

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