Definition

A part of something that is divided into a quintillion equal pieces, or the position in a sequence that corresponds to the number quintillion.

Example

In the scientific notation, one quintillionth of a meter is a very small distance.

Conversation

Did you know that a quintillionth of a second is a real measurement?

Wow, that sounds incredibly small!

I read that it's used in physics to measure really fast events.

That's fascinating! It's amazing how precise measurements can be.

Synonyms & Antonyms

Root Explanation

Quintillionth → It is formed from "quint-" (from Latin "quintus", meaning fifth) and "illion" (from the suffix used in large numbers, derived from the Latin "mille", meaning thousand). The word "quintillionth" refers to the ordinal form of the number that is one part in a quintillion, which is a thousand raised to the fifth power.

Memory Tip

Think of 'quint-' meaning 'fifth' and 'illion' relating to large numbers, so a quintillionth is the fifth level of a thousand.

Visually Confused Words