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

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

The price of anhydrous ammonia, which is used to provide nitrogen to optimize corn plant growth, is up more than 300% from last year.

From Seattle Times • Feb. 24, 2022

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

From New York Times • Sep. 1, 2021

The salts derived from cupric oxide are generally white when anhydrous, but blue or green when hydrated.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" by Various