"0"^^ . "111457057"^^ . "0"^^ . . "line of force"^^ . . "11457057-n"^^ . "107798575"@en-us . . . . . . . "line of force"@en-us . . "an imaginary line in a field of force; direction of the line at any point is the direction of the force at that point"@en-us . "field line"@en-us . . . "110717577"@en-us . . .