noun
a plural form of the noun 'absorptivity', which refers to the ability of a material to absorb or retain a substance
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Absorptivities are important parameters in determining the amount of light absorbed by a material.
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The absorptivities of different fabrics can affect how they look in certain lighting.
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I had no idea the absorptivities of plants could vary so much!
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His absorptivities towards new ideas were quite impressive, always eager to learn and understand.