1837
: a line in a field of force (as a magnetic or electric field) whose tangent at any point gives the direction of the field at that point
1837
: a line in a field of force (as a magnetic or electric field) whose tangent at any point gives the direction of the field at that point
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012