Dictionary  em•is•siv•i•tyPronunciation: (em"u-siv'i-tē, ē'mu-), [key] —n. Thermodynamics. the ability of a surface to emit radiant energy compared to that of a black body at the same temperature and with the same area. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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