Definition of anhydrous
: free from water and especially water of crystallization
Recent Examples of anhydrous from the Web
The valve that failed was on a compressor in the company's anhydrous ammonia system for refrigeration, said Cyndy Chanaca of the Department of Energy & Environmental Protection.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'anhydrous'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of anhydrous
Greek anydros, from a- + hydōr water — more at water
First Known Use: 1802
Medical Definition of anhydrous
: free from water and especially water that is chemically combined in a crystalline substance anhydrous ammonia
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