|λ, k, Sometimes shortened to: conductivity a measure of the
ability of a substance to conduct heat, determined by the rate
of heat flow normally through an area in the substance divided
by the area and by minus the component of the temperature
gradient in the direction of flow: measured in watts per metre
per kelvin| |the offspring of a zebra and a donkey.| |a gadget;
dingus; thingumbob.| A measure of the ability of a material to
transfer heat. Given two surfaces on either side of the material
with a temperature difference between them, the thermal
conductivity is the heat energy transferred per unit time and
per unit surface area, divided by the temperature difference. It
is measured in watts per degree Kelvin.