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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.

Anhydrous ammonia prices have risen 39% versus this time last year, while urea prices have climbed 48%, according to assessments from research firm DTN.

From The Wall Street Journal • Apr. 16, 2026

Anhydrous ammonia can irritate or damage the lungs and burn the eyes and skin.

From Seattle Times • Dec. 20, 2023

Anhydrous ammonia is a colorless, pungent gas that can cause severe health problems, including respiratory damage and blindness.

From New York Times • Sep. 1, 2021

Anhydrous ammonia can cause burns or other health problems when it’s inhaled or comes in contact with skin.

From Washington Times • Apr. 30, 2019

Anhydrous gypsum is a rare variety, into which water does not enter as a component part.

From The Student's Elements of Geology by Lyell, Charles, Sir

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