line_of_force
1. [ noun ] an imaginary line in a field of force; direction of the line at any point is the direction of the force at that point
Synonyms: field_line
Related terms: line magnetic_line_of_force electrical_line_of_force
Similar spelling:   line_of_fire
  line_of_work
  line_of_verse
  line_of_heart
  line_of_products