an·​hy·​drous | \ (ˌ)an-ˈhī-drəs How to pronounce anhydrous (audio) \

Definition of anhydrous

: free from water and especially water of crystallization

Examples of anhydrous in a Sentence

Recent Examples on the Web Fire officials are worried about the potential release of anhydrous ammonia into the surrounding area, said Debbie McDermott, fire marshal for McMinnville. oregonlive, 21 Apr. 2021 River Country was fined by the state in 2010 for safety violations with anhydrous ammonia storage at its facility in Hampton. Matt Mckinney, Star Tribune, 17 Oct. 2020 Later that year, about 1,000 people were evacuated in Randolph when anhydrous ammonia leaked while being unloaded into a broken tank at a River Country facility. Matt Mckinney, Star Tribune, 17 Oct. 2020 Five tanker cars carrying anhydrous ammonia ruptured, releasing a cloud of caustic, poisonous gas over the city. Deanna Weniger, Twin Cities, 7 July 2019 The system used helium as a pressurizing gas, inhibited nitrogen tetroxide for an oxidizer, and a blended hydrazine fuel made up of a mixture of around 50 percent unsymmetrical dimethyl hydrazine and 50 percent anhydrous hydrazine. Alex Hollings, Popular Mechanics, 24 July 2019 Unfortunately, anhydrous ammonia is heavier than air and goes to the lowest areas. Deanna Weniger, Twin Cities, 7 July 2019 According to the Centers for Disease Control and Prevention, anhydrous ammonia is a colorless gas that can cause breathing difficulties, burns, blisters and is fatal if breathed in high concentrations. Frank Abderholden, Lake County News-Sun, 7 June 2019 Speakers showed the council security video footage and television news coverage of two anhydrous ammonia leaks at other U.S. plants, including one that killed a woman. David Twiddy, kansascity, 6 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'anhydrous.' 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 anhydrous

1802, in the meaning defined above

History and Etymology for anhydrous

Greek anydros, from a- + hydōr water — more at water

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Time Traveler for anhydrous

Time Traveler

The first known use of anhydrous was in 1802

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Statistics for anhydrous

Last Updated

26 Apr 2021

Cite this Entry

“Anhydrous.” Dictionary, Merriam-Webster, Accessed 24 Jun. 2021.

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More Definitions for anhydrous


an·​hy·​drous | \ (ˈ)an-ˈhī-drəs How to pronounce anhydrous (audio) \

Medical Definition of anhydrous

: free from water and especially water that is chemically combined in a crystalline substance anhydrous ammonia


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