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Synonyms

anhydrous

American  
[an-hahy-druhs] / ænˈhaɪ drəs /

adjective

Chemistry.
  1. with all water removed, especially water of crystallization.


anhydrous British  
/ ænˈhaɪdrəs /

adjective

  1. containing no water, esp no water of crystallization

"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

anhydrous Scientific  
/ ăn-hīdrəs /
  1. Not containing water, especially water of crystallization.


Etymology

Origin of anhydrous

1810–20; < Greek ánȳdros waterless (with etymological h restored). See an- 1, hydro- 1, -ous

Vocabulary lists containing anhydrous

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.

See Examples For:

In 2023, the company agreed to pay a fine to the EPA over how its facility in Altoona, Iowa, managed chemical risk posed by the more than 10,000 pounds of anhydrous ammonia stored on site.

From Los Angeles Times Jun. 18, 2026

Prices for anhydrous ammonia and urea, key ingredients for fertilizers used to grow corn and soybeans, have appreciated significantly year-over-year, with much of those gains coming after the war started in late February.

From The Wall Street Journal Apr. 16, 2026

A fertilizer plant battered by Hurricane Ida belched highly toxic anhydrous ammonia into the air.

From New York Times Sep. 1, 2021

He said there is no risk from the toxic, explosive anhydrous ammonia at the site that prompted evacuations in a 1.1 mile radius from the fire Saturday.

From Seattle Times Aug. 22, 2021

The metallic salts all crystallize in the anhydrous condition and decompose on heating, leaving a residue of the pure metal.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" by Various

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