great circle

/G R EY1 T S ER1 K AH0 L/
noun
  1. 1

    A circle defined as the intersection of the surface of a sphere and a plane which passes through the centre of the sphere.

  2. 2

    A segment of such circle representing the shortest distance between two points on the surface of a sphere.

Source: https://en.wiktionary.org/wiki/great%20circle