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definitions

emissivity

[ em-uh-siv-i-tee, ee-muh- ]
/ ˌɛm əˈsɪv ɪ ti, ˈi mə- /
|

noun 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.

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Nearby words

  1. emissary vein,
  2. emission,
  3. emission nebula,
  4. emission spectrum,
  5. emissive,
  6. emit,
  7. emittance,
  8. emitter,
  9. emlyn,
  10. emma

Origin of emissivity

First recorded in 1875–80; emissive + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for emissivity

British Dictionary definitions for emissivity

emissivity

/ (ɪmɪˈsɪvɪtɪ, ˌɛm-) /

noun

a measure of the ability of a surface to radiate energy; the ratio of the radiant flux emitted per unit area to that emitted by a black body at the same temperatureSymbol: ε
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012