等力的,等磁力的等磁力线
Isodynamic \I`so*dy*nam"ic\, a. [Iso- + dynamic.]
Of, pertaining to, having, or denoting, equality of force.
{Isodynamic foods} (Physiol.), those foods that produce a
similar amount of heat.
{Isodynamic lines} (Magnetism), lines on the earth's surface
connecting places at which the magnetic intensity is the
same.