等とうポテンシャル面めんMeanings1nounequipotential surfaceTechnical term in physics and engineering for a surface where potential is constant.重じゅう力りょく場ばでは、等とうポテンシャル面めんは質しつ量りょうの周まわりに同どう心しん球きゅう状じょうに広ひろがる。In a gravitational field, equipotential surfaces spread out in concentric spheres around the mass.