anhydrous

[an-hahy-druh s]

See more synonyms for anhydrous on Thesaurus.com

adjective Chemistry.

with all water removed, especially water of crystallization.

Origin of anhydrous

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for anhydrous

arid, bone-dry, dry, parched, waterless

Examples from the Web for anhydrous

Historical Examples of anhydrous

By careful 188 heating it may be made to yield the anhydrous salt.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2
Various
When perfectly pure and anhydrous, it forms a white and highly crystalline mass, rapidly decomposed by air and moisture.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
Nitric acid oxidises it, evolving at the same time nitric oxide; whilst sulphuric acid converts it into anhydrous sulphate.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
A salt hydrate on being heated dissociates into a lower hydrate (or anhydrous salt) and water vapour.
The Phase Rule and Its Applications
Alexander Findlay
This temperature, therefore, is the transition temperature for decahydrate and anhydrous salt.
The Phase Rule and Its Applications
Alexander Findlay

British Dictionary definitions for anhydrous

anhydrous

adjective

containing no water, esp no water of crystallization

Word Origin for anhydrous

C19: from Greek anudros; see an-, hydro-

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

Word Origin and History for anhydrous

adj.

"containing no water," 1819, a modern coinage from Greek an-, privative prefix (see an- (1)), + hydor "water" (see water (n.1)). Greek did have anhydros "waterless," used of arid lands or corpses that had not been given proper funeral rites.

anhydrous in Medicine