emittance

noun

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emit·tance | \ ē-ˈmi-tᵊn(t)s

Definition of emittance

1 : the energy radiated by the surface of a body per second per unit area

2 : emissivity

Examples of emittance in a Sentence

Recent Examples on the Web In the Composer's Inspiration sound chamber gallery, there is barely any light save a deep red emittance. — Stephanie Elam, CNN, 28 Sep. 2021 Close to 1,500 Amazon purchasers have deemed these outdoor lights a worthy purchase for their al fresco space, raving over their long-lasting durability and warm, white emittance of light. — Isabelle Kagan, USA TODAY, 10 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'emittance.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.