"effusivity" meaning in English

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  "etymology_text": "From effusive + -ity.",
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        "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."
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        "(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."
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        "Effusiveness."
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    "Thermal effusivity"
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  "word": "effusivity"
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  "etymology_text": "From effusive + -ity.",
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