1. an imaginary line in a field of force; direction of the line at any point is the direction of the force at that point; [syn: line of force, field line]
WordNet (r) 3.0 (2006):
field line
n 1: an imaginary line in a field of force; direction of the
line at any point is the direction of the force at that
point [syn: line of force, field line]