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Pronunciation varies by accent · noun
(thermodynamics) A measure of a material's ability to exchange thermal energy with its surroundings; the square root of the product of its thermal conductivity and its volumetric heat capacity..
Use effusivity when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Effusivity means (thermodynamics) A measure of a material's ability to exchange thermal energy with its surroundings; the square root of the product of its thermal conductivity and its volumetric heat capacity..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use effusivity where its definition matches the intended context.
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