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

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, "The Art of the Return Trip: How NASA Got Apollo 11 Home," 24 July 2019 Unfortunately, anhydrous ammonia is heavier than air and goes to the lowest areas. Deanna Weniger, Twin Cities, "Local station wants to be source for limited English speaking communities before and after a crisis," 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, "Beach Park ammonia spill: Lake County Sheriff's Office releases body camera image of toxic cloud," 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, "Olathe uses tax incentives to draw aircraft supplier’s manufacturing plant from NKC," 6 Sep. 2017 According to a 2014 report, the plant stores 66,260 pounds of anhydrous sulfur dioxide. Christopher M. Matthews, WSJ, "New Fires Erupt at Arkema Plant Outside Houston," 1 Sep. 2017 Or, a big one is handling anhydrous ammonia in the refrigeration systems, because that stuff will kill you very quickly. Joe Pinsker, The Atlantic, "What the Meat Industry Looks Like From the Inside," 31 Aug. 2017 The ship lost electrical power Saturday, causing levels of anhydrous ammonia to rise. Author: Suzanna Caldwell, Alaska Dispatch News, "Fishing vessel under pollution watch after it lost power near Unalaska," 21 Aug. 2017 A 100-foot sheen was reportedly emanating from the barge, which was carrying 2,500 tons anhydrous ammonia and 800 gallons of diesel fuel, according to the Coast Guard. Laura Mcknight,, "Barge afire off the Mississippi coast carried anhydrous ammonia, diesel fuel: Coast Guard," 3 Aug. 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

The first known use of anhydrous was in 1802

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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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