quintillion

noun

quin·​til·​lion kwin-ˈtil-yən 

US : a number equal to 1 followed by 18 zeros see Table of Numbers

also, British : a number equal to 1 followed by 30 zeros see Table of Numbers

quintillion adjective

quintillionth

kwin-ˈtil-yən(t)th 

adjective or noun

Examples of quintillion in a Sentence

Recent Examples on the Web

The $10 quintillion figure is based on the value of the asteroid's potential bounty if it were transported back to Earth and somehow mined. —Matt Robison, Newsweek, 21 Nov. 2024

The algorithm could create as many as 52 quintillion permutations of the film. —Brian Welk, IndieWire, 21 Nov. 2024

One over-the-counter container of Narcan contains molecules in the quintillions, a number requiring eighteen zeros, and each sailed into the nasal cavity like stones hurled at the night sky. —Blake Nelson, The Mercury News, 13 Oct. 2024

At room temperature, the crystal can remain stable for 300 quintillion years, according to Guinness World Records—more than 21 billion times the current age of the universe. —Margherita Bassi, Smithsonian Magazine, 20 Sep. 2024

Word History

Etymology

Latin quintus + English -illion (as in million)

First Known Use

circa 1690, in the meaning defined above

Kids Definition

quintillion

noun

quin·​til·​lion kwin-ˈtil-yən 

US : a number equal to 1 followed by 18 zeros see number

also, British : a number equal to 1 followed by 30 zeros see number