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back emission

British  

noun

  1. electronics the secondary emission of electrons from an anode

"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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Under President Donald Trump, from opening drilling in the Arctic National Wildlife Refuge to rolling back emission standards, we’ve gone backward.

From Seattle Times

“If the review process produced stronger standards . . . the action would help the US make modest additional progress in meeting the 2025 target. If the review were to weaken the current standard, it would set back emission reduction efforts considerably.”

From Washington Post

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.