reactor

noun
re·​ac·​tor | \ rē-ˈak-tər How to pronounce reactor (audio) \

Definition of reactor

1 : one that reacts
2 : a device (such as a coil, winding, or conductor of small resistance) used to introduce reactance into an alternating-current circuit
3a : a vat for an industrial chemical reaction
b : a device for the controlled release of nuclear energy (as for producing heat)

Examples of reactor in a Sentence

Recent Examples on the Web

In the early 1960s, the adaptation of nuclear reactors resulted in submarines armed with nuclear missiles. Kyle Mizokami, Popular Mechanics, "Does America Still Need the Nuclear Triad?," 23 Jan. 2019 Holtec is building global interest in its small modular reactors, a more efficient form of producing nuclear energy. Susan Schmidt, ProPublica, "Meet the Congressman Defending Questionable Tax Breaks for a Company Connected to His Rich Brother," 2 July 2019 Biden instead wants to put money toward developing the new generation of small modular nuclear reactors in addition to addressing safety concerns. The Washington Post, The Mercury News, "Biden jumps on the Green New Deal train with climate plan," 4 June 2019 Alexievich’s book about Chernobyl was published in Russian in 1997, more than ten years after one of the reactors at the Chernobyl power plant exploded, in what was probably the worst nuclear accident in history. Masha Gessen, The New Yorker, "What HBO’s “Chernobyl” Got Right, and What It Got Terribly Wrong," 4 June 2019 The helium 3 deposits common in areas of the top layer of lunar regolith could power fusion reactors. Adam Mann, Scientific American, "The New Scramble for the Moon," 26 June 2019 Thirty-three years after the Chernobyl nuclear reactor explosion, Pripyat's broad boulevards are crowded with overgrown trees. Dallas News, "Decades after nuclear disaster, tourism is booming at Chernobyl," 18 June 2019 Kamalvandi spoke to Iranian journalists at the country's Arak heavy water nuclear reactor. Nasser Karimi And Jon Gambrell, chicagotribune.com, "Iran speeds up uranium enrichment as Mideast tensions mount," 17 June 2019 Kamalvandi spoke to Iranian journalists in a news conference at the country’s Arak heavy water nuclear reactor. Jon Gambrell, Fortune, "Iran Says It Will Break Uranium Stockpile Limit in 10 Days," 17 June 2019

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

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First Known Use of reactor

1890, in the meaning defined at sense 1

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Last Updated

16 Jul 2019

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Time Traveler for reactor

The first known use of reactor was in 1890

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More Definitions for reactor

reactor

noun

English Language Learners Definition of reactor

physics : a large device that produces nuclear energy

reactor

noun
re·​ac·​tor | \ rē-ˈak-tər How to pronounce reactor (audio) \

Kids Definition of reactor

: a device using atomic energy to produce heat

reactor

noun
re·​ac·​tor | \ rē-ˈak-tər How to pronounce reactor (audio) \

Medical Definition of reactor

1 : one that reacts: as
a : a chemical reagent
b : an individual reacting to a stimulus
c : an individual reacting positively to a foreign substance (as in a test for disease) reactors to tuberculin
2a : a piece of equipment in which a chemical reaction and especially an industrial chemical reaction is carried out
b : a device for the controlled release of nuclear energy (as for producing heat)

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More from Merriam-Webster on reactor

Rhyming Dictionary: Words that rhyme with reactor

Spanish Central: Translation of reactor

Nglish: Translation of reactor for Spanish Speakers

Britannica English: Translation of reactor for Arabic Speakers

Britannica.com: Encyclopedia article about reactor

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