Date: 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
Date: 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's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003