oblong vs set square

oblong

noun
  • Something with an oblong shape. 

  • A rectangle with length and width that are different. 

  • An ellipse with minor and major axes that are different. 

verb
  • To give an oblong shape to. 

  • To extend so as to form an oblong shape. 

adj
  • Having the horizontal axis of a page longer than the vertical; In landscape orientation. 

  • Having a length and width that are different; not square or circular. 

  • Roughly rectangular or elliptical. 

set square

noun
  • A flat triangular piece of plastic or other material, having corners of precise angles, used in technical drawing 

  • A right angle tool used to determine if two surfaces join at a 90-degree angle, composed of two arms, usually made from metal. 

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