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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.

Urea prices climbed 48% and anhydrous ammonia prices rose 39% year-over-year, with most gains after the war in Iran began.

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

The railroad says it also carries fertilizers, including phosphate, urea, ammonium sulfate, ammonium nitrate and anhydrous ammonia.

From Seattle Times • Mar. 20, 2022

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

From New York Times • Sep. 1, 2021

Anhy�drite, anhydrous sulphate of calcium, a mineral presenting several varieties of structure and colour.

From The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli by Various

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