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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.

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

In 2002, its radio stations in Minot, N.D., aired canned music as a toxic cloud blanketed the community after a train transporting anhydrous ammonia for fertilizer derailed and exploded.

From Los Angeles Times • Nov. 25, 2025

But unless posted otherwise, there are no restrictions on transporting anhydrous ammonia on a public road, Schaefer said.

From Seattle Times • Oct. 2, 2023

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

From New York Times • Sep. 1, 2021

Treatment with phosphorus pentachloride gives cyanuric chloride, C3N3Cl3, which is also formed by the combination of anhydrous chlorine and prussic acid in the presence of sunlight.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" by Various

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