等力的,等磁力的等磁力線
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.