Definition

Relating to a mixture where tiny particles are suspended in a liquid or gas, but do not settle out.

Example

The scientist studied the properties of colloidal solutions in her research.

Conversation

I just learned about colloidal solutions in my chemistry class.

Oh really? What’s that all about?

It’s interesting how they have particles that are suspended but not dissolved.

That sounds cool! I’ve always been curious about how those mixtures work.

Synonyms & Antonyms

Root Explanation

Colloidal → It is formed from "colloid" (from Greek "kolla", meaning glue) and the suffix "-al" (meaning pertaining to). The word "colloidal" refers to a substance that has properties related to a colloid, which is a mixture where tiny particles are dispersed throughout another substance without settling.

Memory Tip

Think of 'glue' ('kolla') to remember that 'colloidal' refers to a mixture where tiny particles are suspended, much like how glue holds things together.

Visually Confused Words