point_of_reference
1. [ noun ] an indicator that orients you generally
Synonyms: reference reference_point
Examples:

"it is used as a reference for comparing the heating and the electrical energy involved"

Related terms: indicator standard target buoy landmark white_line lubber's_line benchmark
Similar spelling:   point_of_no_return
  point_of_departure
  point_of_intersection
  point_of_periapsis