- A property of a homogeneous body measured by the ratio of the steady state heat flux, time rate of heat flow per unit area, to the temperature gradient, temperature difference per unit length of heat flow path, in the direction perpendicular to the area.
- The ability of a material, body, surface, or medium to conduct heat.
- The rate at which thermal conductivity (1) occurs. Among the elements, silver is the best conductor of heat, followed by copper, then gold. The thermal conductivity of diamond, an allotropic form of carbon, is significantly higher than that of silver.