Definition

Not containing any water, particularly in a chemical context where it lacks water of crystallization.

Example

The anhydrous salt is used in various chemical reactions because it does not contain water.

Conversation

Did you know that some chemicals are anhydrous and don't contain any water?

Really? I thought everything needed water to exist.

It’s surprising, right? An anhydrous substance can have different properties than its hydrated form.

That makes sense! It's interesting how water can change everything.

Synonyms & Antonyms

Root Explanation

Anhydrous → It is formed from "an-" (meaning without) and "hydor" (from Greek ὕδωρ, meaning water). The word "anhydrous" means without water, indicating a substance that does not contain water molecules.

Memory Tip

Think of 'without' ('an-') and 'water' ('hydor') to remember that anhydrous means something that lacks water.

Visually Confused Words