thermal conductivity

noun Physics.
the amount of heat per unit time per unit area that can be conducted through a plate of unit thickness of a given material, the faces of the plate differing by one unit of temperature.
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Collins
World English Dictionary
thermal conductivity
 
n
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

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00:10
Thermal_conductivity is always a great word to know.
So is doohickey. Does it mean:
the offspring of a zebra and a donkey.
a gadget; dingus; thingumbob.
American Heritage
Science Dictionary
thermal conductivity  
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.
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Example sentences
Thermal conductivity data is of prime importance in designing heat exchangers.
The low thermal conductivity of the polyester blocked his body heat from
  reaching the sensor.
It also has low thermal conductivity and a rather high fusion point.
And perhaps there's changes in thermal conductivity as well which make it
  possible to eliminate the need for motion.
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