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

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

Saturday because of the leak of anhydrous ammonia from an overhead refrigeration line, Harris County Emergency Services District 48 Fire Chief George McAteer said.

From Seattle Times • Feb. 12, 2023

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

From New York Times • Sep. 1, 2021

It is most important that the sodium acetate be anhydrous.

From Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. by Thomssen, E. G.