Adiathermancy refers to the property of a substance or material to resist the flow of heat. Some synonyms for adiathermancy include insulation, impedance, resistance, nonconductivity, and minimal thermal conductivity. Insulation describes the quality of a material to prevent the transfer of heat, while impedance refers to the ability of a substance to resist the flow of electricity, heat, or sound. Resistance also denotes the level of opposition to the flow of heat. Nonconductivity implies a lack of conductivity or the inability to facilitate the flow of electrical current or heat, while minimal thermal conductivity denotes the smallest amount of flow of heat through a material.