Definition

A part of something that is divided into a quadrillion equal pieces, or the position of something in a sequence that is the quadrillionth.

Example

In a scientific context, one quadrillionth of a meter is called a femtometer.

Conversation

Did you know there are a quadrillionth of a chance for that to happen?

Wow, that sounds incredibly rare!

Yeah, it's hard to imagine such a tiny fraction.

I guess it really puts things into perspective.

Synonyms & Antonyms

Root Explanation

Quadrillionth → It is formed from "quadri-" (from Latin "quattuor", meaning four) and "-illion" (a suffix used in large numbers, derived from the Latin "mille", meaning thousand). The word "quadrillionth" refers to one part in a quadrillion, which is a thousand raised to the fourth power, or a million million.

Memory Tip

Think of 'four' ('quadri-') and 'thousand' ('-illion') to remember that 'quadrillionth' means one part in a thousand raised to the fourth power.

Visually Confused Words