Definition

A type of molecule that has both a positive charge and a negative charge at the same time.

Example

In solution, the amino acid exists as a zwitterion, balancing its positive and negative charges.

Conversation

Have you ever heard of a zwitterion?

No, what is that?

It's actually a molecule that has both a positive and a negative charge.

That sounds interesting! I didn't realize molecules could do that.

Synonyms & Antonyms

Root Explanation

Zwitterion is formed from "Zwitter" (from German, meaning hybrid or double) and "ion" (from Greek "ion", meaning going or to go). The term describes a molecule that has both positive and negative charges, thus representing a hybrid state of charge.

Memory Tip

Think of a 'hybrid' ('Zwitter') that has both positive and negative aspects ('ion') — that's why zwitterion refers to a molecule with both types of charge.

Visually Confused Words