Definition

A unit of measurement for length that is one thousandth of a micrometer or one billionth of a meter.

Example

The thickness of the material was measured in millimicrons.

Conversation

Have you ever heard of a millimicron?

No, I haven't! What is it?

It's a really tiny unit of length, like a billionth of a meter.

Wow, that's incredibly small! I can't even imagine how tiny that is.

Synonyms & Antonyms

Root Explanation

Millimicron is formed from "milli-" (meaning one-thousandth) and "micron" (from Greek "mikros", meaning small). The word refers to a unit of measurement that is one-thousandth of a micron, emphasizing its extremely small size.

Memory Tip

Think of 'milli-' meaning one-thousandth and 'micron' meaning small to remember that a millimicron is a very tiny measurement, specifically one-thousandth of a micron.

Visually Confused Words