anhydrous

American  

[an-hahy-druhs] / ænˈhaɪ drəs /

adjective

Chemistry.

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

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anhydrous British  

/ ænˈhaɪdrəs /

adjective

1. containing no water, esp no water of crystallization

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anhydrous Scientific  

/ ăn-hī′drəs /

1. Not containing water, especially water of crystallization.

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Etymology

Origin of anhydrous

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

Example Sentences

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

According to the American Chemical Society, anhydrous ammonia is carried around the United States by pipeline, trucks and trains.

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

The pilot sat in an ejection seat that suggested the electric chair, in front of a fuel compartment containing 2,400 gallons of liquid oxygen and anhydrous ammonia.

From Washington Post • Aug. 29, 2019

This substance is called chloralose; it is obtained by mixing anhydrous chloral with glucose.

From The Pros and Cons of Vivisection by Richet, Charles