Anhydrous – (of a substance) containing no water

(Pronounced an-hai-druhs)

To remember the definition of the word anhydrous, use the following mnemonic:

The anti-hydrant protester is furious (anhydrous). He's made of a substance containing no water and wants all hydrants removed.

Examples of anhydrous in a sentence

Phosphate anhydrous is widely used in toothpaste.

Anhydrous ammonia is injected into soil on some farms.

The substance becomes anhydrous at about 300 degrees celsius.